diff --git a/.github/workflows/gcp-deploy.yml b/.github/workflows/gcp-deploy.yml
index 2dea2611..2644d300 100644
--- a/.github/workflows/gcp-deploy.yml
+++ b/.github/workflows/gcp-deploy.yml
@@ -51,7 +51,7 @@ jobs:
         shell: pwsh
         run: |
           $date = Get-Date -Format "yyyy-MM-dd"
-          $ProdImageName = -join((${{ needs.job1.outputs.IMAGENAME }} -Replace "alpha"),$date)
+          $ProdImageName = -join(('${{ needs.job1.outputs.IMAGENAME }}' -Replace "alpha"),$date)
           Write-Output "Creating image $ProdImageName"
           gcloud compute images create $ProdImageName `
           --source-image ${{ needs.job1.outputs.IMAGENAME }} `