diff --git a/.github/workflows/isogenerator-image.yml b/.github/workflows/isogenerator-image.yml
index 82d6f1e8..a24acb59 100644
--- a/.github/workflows/isogenerator-image.yml
+++ b/.github/workflows/isogenerator-image.yml
@@ -47,8 +47,8 @@ jobs:
 
           # Have tags for tracking builds during pull request
           SHA_SHORT="${GITHUB_SHA::7}"
-          COMMIT_TAGS+=("pr-${{ github.event.number }})
-          COMMIT_TAGS+=("${SHA_SHORT})
+          COMMIT_TAGS+=("pr-${{ github.event.number }}")
+          COMMIT_TAGS+=("${SHA_SHORT}")
 
           COMMIT_TAGS+=("pr-${{ github.event.number }}")
           COMMIT_TAGS+=("${SHA_SHORT}")