diff --git a/.github/workflows/test-backend.yml b/.github/workflows/test-backend.yml
index a6c12e282..199443fca 100644
--- a/.github/workflows/test-backend.yml
+++ b/.github/workflows/test-backend.yml
@@ -61,7 +61,7 @@ jobs:
     - name: Test
       run: pnpm --filter backend test-and-coverage
     - name: Upload to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         files: ./packages/backend/coverage/coverage-final.json
@@ -111,7 +111,7 @@ jobs:
       - name: Test
         run: pnpm --filter backend test-and-coverage:e2e
       - name: Upload to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./packages/backend/coverage/coverage-final.json
diff --git a/.github/workflows/test-frontend.yml b/.github/workflows/test-frontend.yml
index 3fb880fac..caa3fceef 100644
--- a/.github/workflows/test-frontend.yml
+++ b/.github/workflows/test-frontend.yml
@@ -53,7 +53,7 @@ jobs:
     - name: Test
       run: pnpm --filter frontend test-and-coverage
     - name: Upload Coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         files: ./packages/frontend/coverage/coverage-final.json
diff --git a/.github/workflows/test-misskey-js.yml b/.github/workflows/test-misskey-js.yml
index 10c7ccf4d..70ef45692 100644
--- a/.github/workflows/test-misskey-js.yml
+++ b/.github/workflows/test-misskey-js.yml
@@ -50,7 +50,7 @@ jobs:
           CI: true
 
       - name: Upload Coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./packages/misskey-js/coverage/coverage-final.json