diff --git a/.github/workflows/coverage-badge.yml b/.github/workflows/coverage-badge.yml
index dde1851..c7b0b3b 100644
--- a/.github/workflows/coverage-badge.yml
+++ b/.github/workflows/coverage-badge.yml
@@ -72,7 +72,7 @@ jobs:
 
       - name: Upload coverage artifact (PRs only)
         if: ${{ github.event_name == 'pull_request' }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: coverage-report
           path: |
diff --git a/.github/workflows/frontend-ci.yml b/.github/workflows/frontend-ci.yml
index 57dd2bb..b1364e0 100644
--- a/.github/workflows/frontend-ci.yml
+++ b/.github/workflows/frontend-ci.yml
@@ -71,7 +71,7 @@ jobs:
               run: npm run build
 
             - name: Upload build artifact (dist/)
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@v5
               with:
                   name: web-dist
                   path: dist
@@ -79,7 +79,7 @@ jobs:
                   retention-days: 7
 
             - name: Upload coverage (if generated)
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@v5
               with:
                   name: coverage
                   path: |