diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6ba886a..e176be3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
           fi
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4
         if: always()
         with:
           directory: ./coverage