diff --git a/.github/workflows/bench.yml b/.github/workflows/bench.yml
index 424d666..c9314b9 100644
--- a/.github/workflows/bench.yml
+++ b/.github/workflows/bench.yml
@@ -35,7 +35,7 @@ jobs:
           make bench-report
 
       - name: Upload reports
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: benchmark-reports
           path: |
diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index b2076d5..f5579aa 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -60,7 +60,7 @@ jobs:
         alert-comment-cc-users: '@maintainers'
 
     - name: Upload benchmark reports
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: benchmark-reports
         path: |
@@ -188,7 +188,7 @@ jobs:
         # Add memory usage statistics here when we have specific binaries
 
     - name: Upload memory profiling report
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: memory-profiling-report
         path: memory_report.md
diff --git a/.github/workflows/ci-enhanced.yml b/.github/workflows/ci-enhanced.yml
index 3a45710..bccc63e 100644
--- a/.github/workflows/ci-enhanced.yml
+++ b/.github/workflows/ci-enhanced.yml
@@ -134,7 +134,7 @@ jobs:
 
     - name: Upload audit report
       if: always()
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: security-audit-report
         path: audit-report.json
@@ -431,7 +431,7 @@ jobs:
         fi
 
     - name: Upload release artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: release-${{ matrix.target }}
         path: release-artifacts/
@@ -537,7 +537,7 @@ jobs:
         fi
 
     - name: Upload benchmark results
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: benchmark-results
         path: benchmark-results.txt
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d12025b..025a71b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -157,7 +157,7 @@ jobs:
       run: cargo test --workspace --release
 
     - name: Upload build artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: release-build
         path: |
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 725faf1..67e8045 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -380,7 +380,7 @@ jobs:
         EOF
 
     - name: Upload documentation artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: documentation
         path: target/final-docs/
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index aaa5d2d..eea77b2 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -145,7 +145,7 @@ jobs:
         echo '```' >> performance_report.md
 
     - name: Upload performance report
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: nightly-performance-report
         path: |
@@ -199,7 +199,7 @@ jobs:
         echo '```' >> memory_leak_report.md
 
     - name: Upload memory leak report
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: memory-leak-report
         path: memory_leak_report.md
@@ -252,7 +252,7 @@ jobs:
         echo '```' >> dependency_audit.md
 
     - name: Upload dependency audit
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: comprehensive-dependency-audit
         path: dependency_audit.md
diff --git a/.github/workflows/performance-validation.yml b/.github/workflows/performance-validation.yml
index 2d43cd8..b53a832 100644
--- a/.github/workflows/performance-validation.yml
+++ b/.github/workflows/performance-validation.yml
@@ -278,7 +278,7 @@ jobs:
         echo "performance_report_created=true" >> $GITHUB_OUTPUT
 
     - name: Upload performance artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: performance-results-${{ github.sha }}
         path: |
diff --git a/.github/workflows/rollback.yml b/.github/workflows/rollback.yml
index a37c0d9..4013abe 100644
--- a/.github/workflows/rollback.yml
+++ b/.github/workflows/rollback.yml
@@ -146,7 +146,7 @@ jobs:
           EOF
 
       - name: Upload Backup Artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: rollback-backup-${{ github.event.inputs.environment }}-$(date +%Y%m%d-%H%M%S)
           path: backup-*/**
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 4f06c40..527ee0d 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@v5
       with:
         name: security-audit-results
         path: |
@@ -157,7 +157,7 @@ jobs:
         echo '```' >> outdated-report.md
 
     - name: Upload dependency reports
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: dependency-reports
         path: |
@@ -190,7 +190,7 @@ jobs:
         echo '```' >> supply-chain-report.md
 
     - name: Upload supply chain analysis
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v5
       with:
         name: supply-chain-analysis
         path: supply-chain-report.md