diff --git a/publish-if-not-exists/action.yml b/publish-if-not-exists/action.yml
index 5b0f5dd..71ee97a 100644
--- a/publish-if-not-exists/action.yml
+++ b/publish-if-not-exists/action.yml
@@ -38,7 +38,7 @@ runs:
 
         package_ref="$name@$version"
 
-        if [[ ${{ inputs.package_manager }} != "pnpm" && "${{ inputs.package_manager }}" != "npm" ]]; then
+        if [[ "${{ inputs.package_manager }}" != "pnpm" && "${{ inputs.package_manager }}" != "npm" ]]; then
           echo "Unsupported package manager: ${{ inputs.package_manager }}"
           exit 1
         fi