diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6b969ef..cc37403 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -106,7 +106,13 @@ jobs:
       - name: Update action.yml to use edge tagged container image
         if: github.ref == 'refs/heads/main'
         run: |
-          sed -i 's/.*image\:.*/  image\: \"docker\:\/\/ghcr.io\/${{ github.repository_owner }}\/${{ github.event.repository.name }}\:edge\"/' action.yml
+          REPOSITORY_OWNER=${{ github.repository_owner }}
+          REPOSITORY_OWNER=$(echo $REPOSITORY_OWNER | tr '[:upper:]' '[:lower:]')
+          
+          REPOSITORY_NAME=${{ github.event.repository.name }}
+          REPOSITORY_NAME=$(echo $REPOSITORY_NAME | tr '[:upper:]' '[:lower:]')
+          
+          sed -i 's/.*image\:.*/  image\: \"docker\:\/\/ghcr.io\/${REPOSITORY_OWNER}\/${REPOSITORY_NAME}\:edge\"/' action.yml
           cat action.yml
 
       - name: Running test