diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 256984b..fc3f603 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,7 +44,7 @@ jobs:
         run: npm run quality
 
       - name: Archive quality reports
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: quality-reports
           path: |
@@ -79,7 +79,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: test-results-${{ matrix.os }}-node-${{ matrix.node-version }}
           path: coverage/
@@ -106,7 +106,7 @@ jobs:
         run: npm run bench
 
       - name: Store benchmark results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: benchmark-results
           path: benchmark-results.json
@@ -141,7 +141,7 @@ jobs:
           npm pack 2>&1 | grep -E '\.(js|ts|json)$' || true
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: dist
           path: dist/
diff --git a/.github/workflows/performance.yml b/.github/workflows/performance.yml
index 9a385eb..da3ef03 100644
--- a/.github/workflows/performance.yml
+++ b/.github/workflows/performance.yml
@@ -79,7 +79,7 @@ jobs:
           EOF
 
       - name: Upload benchmark results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: benchmark-results
           path: |
diff --git a/.github/workflows/pr-validation.yml b/.github/workflows/pr-validation.yml
index bd2ce71..98bd0bb 100644
--- a/.github/workflows/pr-validation.yml
+++ b/.github/workflows/pr-validation.yml
@@ -166,7 +166,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: test-results-node-${{ matrix.node-version }}
           path: coverage/
@@ -248,7 +248,7 @@ jobs:
           ls -la dist/
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: build-artifacts
           path: dist/
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5ba2b89..e4c269b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -130,7 +130,7 @@ jobs:
           echo "✅ Package build verified"
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: release-package
           path: |
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 1391164..9e68b55 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -64,7 +64,7 @@ jobs:
           fi
 
       - name: Upload audit results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: npm-audit-results
           path: audit-results.json
@@ -145,7 +145,7 @@ jobs:
           echo "License report generated"
 
       - name: Upload license report
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: license-report
           path: licenses.json