diff --git a/.github/workflows/semantic-index.yml b/.github/workflows/semantic-index.yml
index c1365e3..aff4db1 100644
--- a/.github/workflows/semantic-index.yml
+++ b/.github/workflows/semantic-index.yml
@@ -88,7 +88,7 @@ jobs:
           echo "---- meta.json ----"; cat .semantic-index/meta.json
 
       - name: Upload index artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
         with:
           name: semantic-index
           path: .semantic-index/