diff --git a/.github/workflows/benchmarks.yml b/.github/workflows/benchmarks.yml
index 3728ca5..754b4a4 100644
--- a/.github/workflows/benchmarks.yml
+++ b/.github/workflows/benchmarks.yml
@@ -65,7 +65,7 @@ jobs:
           fi
 
       - name: Upload benchmark results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: benchmark-results
           path: bench/results/
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index aa28680..33bb432 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -98,7 +98,7 @@ jobs:
 
       - name: Upload build artifacts
         if: matrix.os == 'ubuntu-latest'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: ananke-${{ runner.os }}-${{ matrix.zig-version }}
           path: |
@@ -224,7 +224,7 @@ jobs:
   #         version: '0.15.2'
   #     - run: brew install tree-sitter
   #     - run: zig build -Doptimize=ReleaseSafe
-  #     - uses: actions/upload-artifact@v4
+  #     - uses: actions/upload-artifact@v6
   #       with:
   #         name: ananke-x86_64-macos
   #         path: zig-out/bin/*
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index fd748a2..0b63af1 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -69,7 +69,7 @@ jobs:
 
       - name: Upload Rust security report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: rust-security-report
           path: rust-security-report.md
@@ -187,7 +187,7 @@ jobs:
 
       - name: Upload Zig security report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: zig-security-report
           path: zig-security-report.md
@@ -253,7 +253,7 @@ jobs:
 
       - name: Upload secret scan report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: secret-scan-report
           path: secret-scan-report.md
@@ -323,7 +323,7 @@ jobs:
 
       - name: Upload license report
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: license-report
           path: license-report.md
@@ -387,7 +387,7 @@ jobs:
           echo "5. Document security decisions" >> SECURITY_SUMMARY.md
 
       - name: Upload security summary
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: security-summary
           path: SECURITY_SUMMARY.md