diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..6dc7fe8
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: Continuous Integration
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Test
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        node-version: ["12", "14", "16", "18"]
+
+    steps:
+      - name: Checkout project
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
+          #cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
diff --git a/build/main.cjs b/build/main.cjs
index 35a4df6..effe0fb 100644
--- a/build/main.cjs
+++ b/build/main.cjs
@@ -25,6 +25,10 @@ function _interopNamespace(e) {
 
 var fastFile__namespace = /*#__PURE__*/_interopNamespace(fastFile);
 
+const BIN_FORMAT_1 = 0x00000000;
+const BIN_FORMAT_2 = 0x10000000;
+const SECTIONS_TABLE_STEP = 256;
+
 async function readBinFile(fileName, type, maxVersion, cacheSize, pageSize) {
 
     const fd = await fastFile__namespace.readExisting(fileName, cacheSize, pageSize);
@@ -33,62 +37,143 @@ async function readBinFile(fileName, type, maxVersion, cacheSize, pageSize) {
     let readedType = "";
     for (let i=0; i<4; i++) readedType += String.fromCharCode(b[i]);
 
-    if (readedType != type) throw new Error(fileName + ": Invalid File format");
+    if (readedType !== type) {
+        fd.close();
+        throw new Error(fileName + ": Invalid File format");
+    }
 
     let v = await fd.readULE32();
 
-    if (v>maxVersion) throw new Error("Version not supported");
+    let [version, binVersion] = decodeVersion(v);
 
-    const nSections = await fd.readULE32();
+    if (version > maxVersion) {
+        fd.close();
+        throw new Error("Version not supported");
+    }
 
-    // Scan sections
     let sections = [];
-    for (let i=0; i<nSections; i++) {
-        let ht = await fd.readULE32();
-        let hl = await fd.readULE64();
-        if (typeof sections[ht] == "undefined") sections[ht] = [];
-        sections[ht].push({
-            p: fd.pos,
-            size: hl
-        });
-        fd.pos += hl;
+    if(BIN_FORMAT_1 === binVersion) {
+        await readBinFileV1();
+    } else {
+        await readBinFileV2();
     }
 
+    fd.binVersion = binVersion;
+
     return {fd, sections};
+
+    async function readBinFileV1() {
+        const nSections = await fd.readULE32();
+
+        // Scan sections
+        for (let i = 0; i < nSections; i++) {
+            let ht = await fd.readULE32();
+            let hl = await fd.readULE64();
+            if (typeof sections[ht] == "undefined") sections[ht] = [];
+            sections[ht].push({
+                p: fd.pos,
+                size: hl
+            });
+            fd.pos += hl;
+        }
+    }
+
+    async function readBinFileV2() {
+        //Reserved sections table size
+        const nReservedSections = await fd.readULE32();
+
+        //Get sections
+        for (let i = 0; i < nReservedSections; i++) {
+            //Section id
+            let sectionId = await fd.readULE32();
+            //Section size
+            let sectionSize = await fd.readULE64();
+            //Offset
+            let sectionOffset = await fd.readULE64();
+            if (sectionId !== 0) {
+                if (sections[sectionId] === undefined) sections[sectionId] = [];
+                sections[sectionId].push({
+                    p: sectionOffset,
+                    size: sectionSize,
+                });
+            }
+        }
+    }
 }
 
 async function createBinFile(fileName, type, version, nSections, cacheSize, pageSize) {
-
     const fd = await fastFile__namespace.createOverride(fileName, cacheSize, pageSize);
 
     const buff = new Uint8Array(4);
     for (let i=0; i<4; i++) buff[i] = type.charCodeAt(i);
-    await fd.write(buff, 0); // Magic "r1cs"
+    await fd.write(buff, 0); // 4 bytes text indicating the file's type
 
     await fd.writeULE32(version); // Version
-    await fd.writeULE32(nSections); // Number of Sections
+
+    let [fileVersion, binVersion] = decodeVersion(version);
+
+    if(BIN_FORMAT_1 === binVersion) {
+        await fd.writeULE32(nSections); // Number of Sections
+    } else {
+        let nReservedSections = Math.ceil(nSections / SECTIONS_TABLE_STEP) * SECTIONS_TABLE_STEP;
+        await fd.writeULE32(nReservedSections); // Number of reserved sections
+
+        fd.pSectionsTable = fd.pos;
+        for (let i = 0; i < nReservedSections; i++) {
+            await fd.writeULE32(0); // Section type
+            await fd.writeULE64(0); // Section size
+            await fd.writeULE64(0); // Absolute offset
+        }
+    }
+
+    fd.binVersion = binVersion;
 
     return fd;
 }
 
 async function startWriteSection(fd, idSection) {
-    if (typeof fd.writingSection !== "undefined") throw new Error("Already writing a section");
-    await fd.writeULE32(idSection); // Header type
-    fd.writingSection = {
-        pSectionSize: fd.pos
-    };
-    await fd.writeULE64(0); // Temporally set to 0 length
+    if (typeof fd.writingSection !== "undefined") {
+        throw new Error("Already writing a section");
+    }
+
+    if(BIN_FORMAT_1 === fd.binVersion) {
+        await fd.writeULE32(idSection); // Header type
+        fd.writingSection = {
+            pSectionSize: fd.pos
+        };
+        await fd.writeULE64(0); // Temporally set to 0 length
+    } else {
+        fd.writingSection = {
+            pSectionSize: fd.pos
+        };
+        const currentPos = fd.pos;
+        fd.pos = fd.pSectionsTable;
+        await fd.writeULE32(idSection); // Section type
+        await fd.writeULE64(0); // Section size, temporally set to 0
+        await fd.writeULE64(currentPos); // Absolute offset
+        fd.pos = currentPos;
+    }
 }
 
 async function endWriteSection(fd) {
     if (typeof fd.writingSection === "undefined") throw new Error("Not writing a section");
 
-    const sectionSize = fd.pos - fd.writingSection.pSectionSize - 8;
-    const oldPos = fd.pos;
-    fd.pos = fd.writingSection.pSectionSize;
-    await fd.writeULE64(sectionSize);
-    fd.pos = oldPos;
-    delete fd.writingSection;
+    if(BIN_FORMAT_1 === fd.binVersion) {
+        const sectionSize = fd.pos - fd.writingSection.pSectionSize - 8;
+        const oldPos = fd.pos;
+        fd.pos = fd.writingSection.pSectionSize;
+        await fd.writeULE64(sectionSize);
+        fd.pos = oldPos;
+        delete fd.writingSection;
+    } else {
+        const sectionSize = fd.pos - fd.writingSection.pSectionSize;
+        const currentPos = fd.pos;
+        fd.pos = fd.pSectionsTable + 4;
+        await fd.writeULE64(sectionSize); // Section size
+        fd.pos = currentPos;
+        fd.pSectionsTable += 20;
+        delete fd.writingSection;
+    }
 }
 
 async function startReadUniqueSection(fd, sections, idSection) {
@@ -174,6 +259,17 @@ async function sectionIsEqual(fd1, sections1, fd2, sections2, idSection) {
     return true;
 }
 
+function decodeVersion(encodedVersion) {
+    let binVersion = encodedVersion & BIN_FORMAT_2;
+
+    let version;
+    if(BIN_FORMAT_2 === binVersion) {
+        version = encodedVersion - BIN_FORMAT_2;
+    }
+
+    return [version, binVersion];
+}
+
 exports.copySection = copySection;
 exports.createBinFile = createBinFile;
 exports.endReadSection = endReadSection;
diff --git a/package-lock.json b/package-lock.json
index 7302e16..66d32a1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,10 @@
         "ffjavascript": "^0.2.48"
       },
       "devDependencies": {
+        "chai": "^4.3.6",
+        "chai-as-promised": "^7.1.1",
         "eslint": "^8.6.0",
+        "mocha": "^10.0.0",
         "rollup": "^2.20.0"
       }
     },
@@ -57,6 +60,12 @@
       "integrity": "sha512-ZnQMnLV4e7hDlUvw8H+U8ASL02SS2Gn6+9Ac3wGGLIe7+je2AeAOxPY+izIPJDfFDb7eDjev0Us8MO1iFRN8hA==",
       "dev": true
     },
+    "node_modules/@ungap/promise-all-settled": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@ungap/promise-all-settled/-/promise-all-settled-1.1.2.tgz",
+      "integrity": "sha512-sL/cEvJWAnClXw0wHk85/2L0G6Sj8UB0Ctc1TEMbKSsmpRosqhwj9gWgFRZSrBr2f9tiXISwNhCPmlfqUqyb9Q==",
+      "dev": true
+    },
     "node_modules/acorn": {
       "version": "8.7.1",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.7.1.tgz",
@@ -94,6 +103,15 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
+      "dev": true,
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/ansi-regex": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
@@ -118,12 +136,34 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/anymatch": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.2.tgz",
+      "integrity": "sha512-P43ePfOAIupkguHUycrc4qJ9kz8ZiuOUijaETwX7THt0Y/GNK7v0aa8rY816xWjZ7rJdA5XdMcpVFTKMq+RvWg==",
+      "dev": true,
+      "dependencies": {
+        "normalize-path": "^3.0.0",
+        "picomatch": "^2.0.4"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
     "node_modules/argparse": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
       "dev": true
     },
+    "node_modules/assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -138,6 +178,15 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/binary-extensions": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
+      "integrity": "sha512-jDctJ/IVQbZoJykoeHbhXpOlNBqGNcwXJKJog42E5HDPUwQTSdjCHdihjj0DlnheQ7blbT6dHOafNAiS8ooQKA==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/blakejs": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/blakejs/-/blakejs-1.1.1.tgz",
@@ -153,6 +202,24 @@
         "concat-map": "0.0.1"
       }
     },
+    "node_modules/braces": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
+      "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
+      "dev": true,
+      "dependencies": {
+        "fill-range": "^7.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/browser-stdout": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.1.tgz",
+      "integrity": "sha512-qhAVI1+Av2X7qelOfAIYwXONood6XlZE/fXaBSmW/T5SzLAmCgzi+eiWE7fUvbHaeNBQH13UftjpXxsfLkMpgw==",
+      "dev": true
+    },
     "node_modules/callsites": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/callsites/-/callsites-3.1.0.tgz",
@@ -162,6 +229,48 @@
         "node": ">=6"
       }
     },
+    "node_modules/camelcase": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-6.3.0.tgz",
+      "integrity": "sha512-Gmy6FhYlCY7uOElZUSbxo2UCDH8owEk996gkbrpsgGtrJLM3J7jGxl9Ic7Qwwj4ivOE5AWZWRMecDdF7hqGjFA==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/chai": {
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.6.tgz",
+      "integrity": "sha512-bbcp3YfHCUzMOvKqsztczerVgBKSsEijCySNlHHbX3VG1nskvqjz5Rfso1gGwD6w6oOV3eI60pKuMOV5MV7p3Q==",
+      "dev": true,
+      "dependencies": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "loupe": "^2.3.1",
+        "pathval": "^1.1.1",
+        "type-detect": "^4.0.5"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "dependencies": {
+        "check-error": "^1.0.2"
+      },
+      "peerDependencies": {
+        "chai": ">= 2.1.2 < 5"
+      }
+    },
     "node_modules/chalk": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
@@ -178,6 +287,65 @@
         "url": "https://github.com/chalk/chalk?sponsor=1"
       }
     },
+    "node_modules/check-error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha512-BrgHpW9NURQgzoNyjfq0Wu6VFO6D7IZEmJNdtgNqpzGG8RuNFHt2jQxWlAs4HMe119chBnv+34syEZtc6IhLtA==",
+      "dev": true,
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/chokidar": {
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
+      "integrity": "sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://paulmillr.com/funding/"
+        }
+      ],
+      "dependencies": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
+      }
+    },
+    "node_modules/chokidar/node_modules/glob-parent": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
+      "dev": true,
+      "dependencies": {
+        "is-glob": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/cliui": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/cliui/-/cliui-7.0.4.tgz",
+      "integrity": "sha512-OcRE68cOsVMXp1Yvonl/fzkQOyjLSu/8bhPDfQt0e0/Eb283TKP20Fs2MqoPsr9SwA595rRCA+QMzYc9nBP+JQ==",
+      "dev": true,
+      "dependencies": {
+        "string-width": "^4.2.0",
+        "strip-ansi": "^6.0.0",
+        "wrap-ansi": "^7.0.0"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -217,9 +385,9 @@
       }
     },
     "node_modules/debug": {
-      "version": "4.3.3",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.3.tgz",
-      "integrity": "sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==",
+      "version": "4.3.4",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
+      "integrity": "sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==",
       "dev": true,
       "dependencies": {
         "ms": "2.1.2"
@@ -233,12 +401,45 @@
         }
       }
     },
+    "node_modules/decamelize": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/decamelize/-/decamelize-4.0.0.tgz",
+      "integrity": "sha512-9iE1PgSik9HeIIw2JO94IidnE3eBoQrFJ3w7sFuzSX4DpmZ3v5sZpUiV5Swcf6mQEF+Y0ru8Neo+p+nyh2J+hQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/deep-eql": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
+      "dev": true,
+      "dependencies": {
+        "type-detect": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=0.12"
+      }
+    },
     "node_modules/deep-is": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.4.tgz",
       "integrity": "sha512-oIPzksmTg4/MriiaYGO+okXDT7ztn/w3Eptv/+gSIdMdKsJo0u4CfYNFJPy+4SKMuCqGw2wxnA+URMg3t8a/bQ==",
       "dev": true
     },
+    "node_modules/diff": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-5.0.0.tgz",
+      "integrity": "sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.3.1"
+      }
+    },
     "node_modules/doctrine": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-3.0.0.tgz",
@@ -251,6 +452,21 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/emoji-regex": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
+      "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
+      "dev": true
+    },
+    "node_modules/escalade": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
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+    "type-detect": {
+      "version": "4.0.8",
+      "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
+      "dev": true
+    },
     "type-fest": {
       "version": "0.20.2",
       "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz",
@@ -1724,11 +2877,73 @@
       "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==",
       "dev": true
     },
+    "workerpool": {
+      "version": "6.2.1",
+      "resolved": "https://registry.npmjs.org/workerpool/-/workerpool-6.2.1.tgz",
+      "integrity": "sha512-ILEIE97kDZvF9Wb9f6h5aXK4swSlKGUcOEGiIYb2OOu/IrDU9iwj0fD//SsA6E5ibwJxpEvhullJY4Sl4GcpAw==",
+      "dev": true
+    },
+    "wrap-ansi": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
+      "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
+      "dev": true,
+      "requires": {
+        "ansi-styles": "^4.0.0",
+        "string-width": "^4.1.0",
+        "strip-ansi": "^6.0.0"
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
       "dev": true
+    },
+    "y18n": {
+      "version": "5.0.8",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz",
+      "integrity": "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==",
+      "dev": true
+    },
+    "yargs": {
+      "version": "16.2.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-16.2.0.tgz",
+      "integrity": "sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==",
+      "dev": true,
+      "requires": {
+        "cliui": "^7.0.2",
+        "escalade": "^3.1.1",
+        "get-caller-file": "^2.0.5",
+        "require-directory": "^2.1.1",
+        "string-width": "^4.2.0",
+        "y18n": "^5.0.5",
+        "yargs-parser": "^20.2.2"
+      }
+    },
+    "yargs-parser": {
+      "version": "20.2.4",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.4.tgz",
+      "integrity": "sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==",
+      "dev": true
+    },
+    "yargs-unparser": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-2.0.0.tgz",
+      "integrity": "sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==",
+      "dev": true,
+      "requires": {
+        "camelcase": "^6.0.0",
+        "decamelize": "^4.0.0",
+        "flat": "^5.0.2",
+        "is-plain-obj": "^2.1.0"
+      }
+    },
+    "yocto-queue": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+      "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index 6e4771a..1a22449 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,10 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "eslint": "^8.6.0",
-    "rollup": "^2.20.0"
+    "rollup": "^2.20.0",
+    "mocha": "^10.0.0",
+    "chai": "^4.3.6",
+    "chai-as-promised": "^7.1.1"
   },
   "dependencies": {
     "fastfile": "0.0.20",
diff --git a/src/binfileutils.js b/src/binfileutils.js
index d4a5245..af732c2 100644
--- a/src/binfileutils.js
+++ b/src/binfileutils.js
@@ -2,6 +2,10 @@
 import  { Scalar, BigBuffer } from "ffjavascript";
 import * as fastFile from "fastfile";
 
+const BIN_FORMAT_1 = 0x00000000;
+const BIN_FORMAT_2 = 0x10000000;
+const SECTIONS_TABLE_STEP = 256;
+
 export async function readBinFile(fileName, type, maxVersion, cacheSize, pageSize) {
 
     const fd = await fastFile.readExisting(fileName, cacheSize, pageSize);
@@ -10,62 +14,143 @@ export async function readBinFile(fileName, type, maxVersion, cacheSize, pageSiz
     let readedType = "";
     for (let i=0; i<4; i++) readedType += String.fromCharCode(b[i]);
 
-    if (readedType != type) throw new Error(fileName + ": Invalid File format");
+    if (readedType !== type) {
+        fd.close();
+        throw new Error(fileName + ": Invalid File format");
+    }
 
     let v = await fd.readULE32();
 
-    if (v>maxVersion) throw new Error("Version not supported");
+    let [version, binVersion] = decodeVersion(v);
 
-    const nSections = await fd.readULE32();
+    if (version > maxVersion) {
+        fd.close();
+        throw new Error("Version not supported");
+    }
 
-    // Scan sections
     let sections = [];
-    for (let i=0; i<nSections; i++) {
-        let ht = await fd.readULE32();
-        let hl = await fd.readULE64();
-        if (typeof sections[ht] == "undefined") sections[ht] = [];
-        sections[ht].push({
-            p: fd.pos,
-            size: hl
-        });
-        fd.pos += hl;
+    if(BIN_FORMAT_1 === binVersion) {
+        await readBinFileV1();
+    } else {
+        await readBinFileV2();
     }
 
+    fd.binVersion = binVersion;
+
     return {fd, sections};
+
+    async function readBinFileV1() {
+        const nSections = await fd.readULE32();
+
+        // Scan sections
+        for (let i = 0; i < nSections; i++) {
+            let ht = await fd.readULE32();
+            let hl = await fd.readULE64();
+            if (typeof sections[ht] == "undefined") sections[ht] = [];
+            sections[ht].push({
+                p: fd.pos,
+                size: hl
+            });
+            fd.pos += hl;
+        }
+    }
+
+    async function readBinFileV2() {
+        //Reserved sections table size
+        const nReservedSections = await fd.readULE32();
+
+        //Get sections
+        for (let i = 0; i < nReservedSections; i++) {
+            //Section id
+            let sectionId = await fd.readULE32();
+            //Section size
+            let sectionSize = await fd.readULE64();
+            //Offset
+            let sectionOffset = await fd.readULE64();
+            if (sectionId !== 0) {
+                if (sections[sectionId] === undefined) sections[sectionId] = [];
+                sections[sectionId].push({
+                    p: sectionOffset,
+                    size: sectionSize,
+                });
+            }
+        }
+    }
 }
 
 export async function createBinFile(fileName, type, version, nSections, cacheSize, pageSize) {
-
     const fd = await fastFile.createOverride(fileName, cacheSize, pageSize);
 
     const buff = new Uint8Array(4);
     for (let i=0; i<4; i++) buff[i] = type.charCodeAt(i);
-    await fd.write(buff, 0); // Magic "r1cs"
+    await fd.write(buff, 0); // 4 bytes text indicating the file's type
 
     await fd.writeULE32(version); // Version
-    await fd.writeULE32(nSections); // Number of Sections
+
+    let [fileVersion, binVersion] = decodeVersion(version);
+
+    if(BIN_FORMAT_1 === binVersion) {
+        await fd.writeULE32(nSections); // Number of Sections
+    } else {
+        let nReservedSections = Math.ceil(nSections / SECTIONS_TABLE_STEP) * SECTIONS_TABLE_STEP;
+        await fd.writeULE32(nReservedSections); // Number of reserved sections
+
+        fd.pSectionsTable = fd.pos;
+        for (let i = 0; i < nReservedSections; i++) {
+            await fd.writeULE32(0); // Section type
+            await fd.writeULE64(0); // Section size
+            await fd.writeULE64(0); // Absolute offset
+        }
+    }
+
+    fd.binVersion = binVersion;
 
     return fd;
 }
 
 export async function startWriteSection(fd, idSection) {
-    if (typeof fd.writingSection !== "undefined") throw new Error("Already writing a section");
-    await fd.writeULE32(idSection); // Header type
-    fd.writingSection = {
-        pSectionSize: fd.pos
-    };
-    await fd.writeULE64(0); // Temporally set to 0 length
+    if (typeof fd.writingSection !== "undefined") {
+        throw new Error("Already writing a section");
+    }
+
+    if(BIN_FORMAT_1 === fd.binVersion) {
+        await fd.writeULE32(idSection); // Header type
+        fd.writingSection = {
+            pSectionSize: fd.pos
+        };
+        await fd.writeULE64(0); // Temporally set to 0 length
+    } else {
+        fd.writingSection = {
+            pSectionSize: fd.pos
+        };
+        const currentPos = fd.pos;
+        fd.pos = fd.pSectionsTable;
+        await fd.writeULE32(idSection); // Section type
+        await fd.writeULE64(0); // Section size, temporally set to 0
+        await fd.writeULE64(currentPos); // Absolute offset
+        fd.pos = currentPos;
+    }
 }
 
 export async function endWriteSection(fd) {
     if (typeof fd.writingSection === "undefined") throw new Error("Not writing a section");
 
-    const sectionSize = fd.pos - fd.writingSection.pSectionSize - 8;
-    const oldPos = fd.pos;
-    fd.pos = fd.writingSection.pSectionSize;
-    await fd.writeULE64(sectionSize);
-    fd.pos = oldPos;
-    delete fd.writingSection;
+    if(BIN_FORMAT_1 === fd.binVersion) {
+        const sectionSize = fd.pos - fd.writingSection.pSectionSize - 8;
+        const oldPos = fd.pos;
+        fd.pos = fd.writingSection.pSectionSize;
+        await fd.writeULE64(sectionSize);
+        fd.pos = oldPos;
+        delete fd.writingSection;
+    } else {
+        const sectionSize = fd.pos - fd.writingSection.pSectionSize;
+        const currentPos = fd.pos;
+        fd.pos = fd.pSectionsTable + 4;
+        await fd.writeULE64(sectionSize); // Section size
+        fd.pos = currentPos;
+        fd.pSectionsTable += 20;
+        delete fd.writingSection;
+    }
 }
 
 export async function startReadUniqueSection(fd, sections, idSection) {
@@ -150,3 +235,14 @@ export async function sectionIsEqual(fd1, sections1, fd2, sections2, idSection)
     await endReadSection(fd2);
     return true;
 }
+
+function decodeVersion(encodedVersion) {
+    let binVersion = encodedVersion & BIN_FORMAT_2;
+
+    let version;
+    if(BIN_FORMAT_2 === binVersion) {
+        version = encodedVersion - BIN_FORMAT_2;
+    }
+
+    return [version, binVersion];
+}
\ No newline at end of file
diff --git a/test/binfileutils.test.js b/test/binfileutils.test.js
new file mode 100644
index 0000000..7591845
--- /dev/null
+++ b/test/binfileutils.test.js
@@ -0,0 +1,170 @@
+import * as binFileUtils from "../src/binfileutils.js";
+import path from "path";
+import fs from "fs";
+import assert from "assert";
+
+import * as chai from "chai";
+import chaiAsPromised from "chai-as-promised";
+
+chai.use(chaiAsPromised);
+const expect = chai.expect;
+
+function getRandomValue(higher = 10) {
+    return Math.floor((Math.random() * higher) + 1);
+}
+
+function createRandomSections(nSections) {
+    let sections = Array(nSections);
+
+    //Create random sections data
+    let currentSectionId = 1;
+    for (let i = 0; i < nSections; i++) {
+        let section = {};
+        section.id = currentSectionId;
+        section.values = [];
+
+        const nElements = getRandomValue(10);
+        for (let j = 0; j < nElements; j++) {
+            const value = getRandomValue();
+            section.values.push(value);
+        }
+
+        currentSectionId += getRandomValue();
+        sections[i] = section;
+    }
+    return sections;
+}
+
+async function createBinFile(fileName, fileType, fileVersion, nSections, sections) {
+    let file = await binFileUtils.createBinFile(fileName, fileType, fileVersion, nSections, 1 << 22, 1 << 24);
+
+    for (let i = 0; i < sections.length; i++) {
+        await binFileUtils.startWriteSection(file, sections[i].id);
+        for (let j = 0; j < sections[i].values.length; j++) {
+            await file.writeULE32(sections[i].values[j]);
+        }
+        await binFileUtils.endWriteSection(file);
+    }
+    await file.close();
+}
+
+async function readBinFile(fileName, fileType, fileVersion, nSections, sections) {
+    let res = [];
+    let {fd: readFile, sections: readSections} = await binFileUtils.readBinFile(fileName, fileType, fileVersion, 1 << 22, 1 << 24);
+
+    let sectionIdx = getRandomValue(nSections) - 1;
+
+    for (let i = 0; i < nSections; i++) {
+        let section = {};
+        section.id = sections[sectionIdx].id;
+        section.values = [];
+
+        await binFileUtils.startReadUniqueSection(readFile, readSections, section.id);
+        for (let j = 0; j < sections[sectionIdx].values.length; j++) {
+            section.values.push(await readFile.readULE32());
+        }
+        await binFileUtils.endReadSection(readFile);
+        res.push(section);
+        sectionIdx = (sectionIdx + 1) % nSections;
+    }
+    await readFile.close();
+
+    return res.sort((e1, e2) => e1.id - e2.id);
+}
+
+describe("Bin file utils tests", function () {
+    this.timeout(60000);
+
+    const fileName = path.join("test", "test.bin");
+    const fileType = "test";
+
+    it("creates a bin file using bin format 1 and reads the same content from the file", async () => {
+        const nSections = getRandomValue();
+        const sections = createRandomSections(nSections);
+
+        //Write bin file
+        const fileVersion = 1;
+        await createBinFile(fileName, fileType, fileVersion, nSections, sections);
+        assert(fs.existsSync(fileName));
+
+        //Read bin file
+        const readSections = await readBinFile(fileName, fileType, fileVersion, nSections, sections);
+
+        assert.deepEqual(sections, readSections);
+
+        await fs.promises.unlink(fileName);
+    });
+
+    it("creates a bin file using bin format 2 and reads the same content from the file", async () => {
+        const nSections = getRandomValue();
+        let sections = createRandomSections(nSections);
+
+        //Write bin file
+        const fileVersion = 1 | 0x10000000;
+        await createBinFile(fileName, fileType, fileVersion, nSections, sections);
+        assert(fs.existsSync(fileName));
+
+        //Read bin file
+        const readSections = await readBinFile(fileName, fileType, fileVersion, nSections, sections);
+
+        assert.deepEqual(sections, readSections);
+
+        await fs.promises.unlink(fileName);
+    });
+
+    it("throws an error when trying to write a section while already writing a section or close a section while not writing a section", async () => {
+        const fileVersion = 1 | 0x10000000;
+        let nSections = 0;
+        let file = await binFileUtils.createBinFile(fileName, fileType, fileVersion, nSections, 1 << 22, 1 << 24);
+
+        await binFileUtils.startWriteSection(file, 1);
+        await expect(binFileUtils.startWriteSection(file, 2)).to.be.rejected;
+        await binFileUtils.endWriteSection(file);
+        await expect(binFileUtils.endWriteSection(file)).to.be.rejected;
+
+        file.close();
+        await fs.promises.unlink(fileName);
+    });
+
+    it("throws an error when trying to read a wrong type file or max version", async () => {
+        const nSections = getRandomValue();
+        let sections = createRandomSections(nSections);
+
+        //Write bin file
+        const fileVersion = 1 | 0x10000000;
+        await createBinFile(fileName, fileType, fileVersion, nSections, sections);
+        assert(fs.existsSync(fileName));
+
+        //Read bin file with wrong type
+        await expect(readBinFile(fileName, "xxxx", fileVersion, nSections, sections)).to.be.rejected;
+
+        //Read bin file with wrong version
+        await expect(readBinFile(fileName, fileType, 0, nSections, sections)).to.be.rejected;
+
+        await fs.promises.unlink(fileName);
+    });
+
+    it("throws an error when closing a non-reading section, when already reading a section, when end reads a section while not read all the section or when section is missing ", async () => {
+        const nSections = getRandomValue();
+        let sections = createRandomSections(nSections);
+
+        //Write bin file
+        const fileVersion = 1 | 0x10000000;
+        await createBinFile(fileName, fileType, fileVersion, nSections, sections);
+
+        let {fd: readFile, sections: readSections} = await binFileUtils.readBinFile(fileName, fileType, fileVersion, 1 << 22, 1 << 24);
+
+        await expect(binFileUtils.endReadSection(readFile)).to.be.rejected;
+
+        await binFileUtils.startReadUniqueSection(readFile, readSections, sections[0].id);
+        await expect(binFileUtils.startReadUniqueSection(readFile, readSections, sections[0].id)).to.be.rejected;
+
+        await expect(binFileUtils.endReadSection(readFile)).to.be.rejected;
+        await binFileUtils.endReadSection(readFile, true);
+
+        await expect(binFileUtils.startReadUniqueSection(readFile, readSections, 1000000)).to.be.rejected;
+
+        await fs.promises.unlink(fileName);
+    });
+
+});
\ No newline at end of file