diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ac6cf96..ae456ef 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
       - uses: LinqLover/create-image@latest
         id: create-image
         with:
-          squeak-version: 6.0
+          squeak-version: '6.0'
           prepare-script: ./scripts/prepareImage.st
           postpare-script: ./scripts/postpareImage.st
       - uses: actions/upload-artifact@master