diff --git a/src/converter/tsconfig.json b/src/converter/tsconfig.json
index 6798378..7854362 100644
--- a/src/converter/tsconfig.json
+++ b/src/converter/tsconfig.json
@@ -6,7 +6,7 @@
     "esModuleInterop": true,
     "experimentalDecorators": true,
     "declaration": true,
-    "target": "es2022",
+    "target": "ES2015",
     "lib": ["es2022"],
     "types": ["node"],
     "rootDir": "./",
diff --git a/src/core/tsconfig.json b/src/core/tsconfig.json
index 272a4f6..0fad6a6 100644
--- a/src/core/tsconfig.json
+++ b/src/core/tsconfig.json
@@ -6,7 +6,7 @@
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "declaration": true,
-    "target": "es2022",
+    "target": "ES2015",
     "lib": ["es2022", "dom"],
     "rootDir": "./",
     "outDir": "../../lib/core/dist"
diff --git a/tsconfig.docs.json b/tsconfig.docs.json
index dd60a8c..968921b 100644
--- a/tsconfig.docs.json
+++ b/tsconfig.docs.json
@@ -6,7 +6,7 @@
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "declaration": true,
-    "target": "es2022",
+    "target": "es2015",
     "lib": ["es2022", "dom"]
   },
   "include": ["./src/core/**/*.ts"],