diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 05a0ce5..5431a8c 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -51,25 +51,25 @@ jobs:
           apiVersion: serving.knative.dev/v1
           kind: Service
           metadata:
-            name: $SERVICE_NAME
+            name: "$SERVICE_NAME"
             labels:
-              cloud.googleapis.com/location: $REGION
+              cloud.googleapis.com/location: "$REGION"
             annotations:
-              run.googleapis.com/execution-environment: gen2
+              run.googleapis.com/execution-environment: "gen2"
               run.googleapis.com/startup-cpu-boost: "true"
-              autoscaling.knative.dev/maxScale: 16
+              autoscaling.knative.dev/maxScale: "16"
           spec:
             template:
               spec:
-                containerConcurrency: 120
-                timeoutSeconds: 60
+                containerConcurrency: "120"
+                timeoutSeconds: "60"
                 containers:
-                  - image: $REGISTRY/$SERVICE_NAME:$GITHUB_SHA
-                    name: play
+                  - image: "$REGISTRY/$SERVICE_NAME:$GITHUB_SHA"
+                    name: "play"
                     resources:
                       limits:
-                        cpu: 4000m
-                        memory: 8Gi
+                        cpu: "4000m"
+                        memory: "8Gi"
           EOF
 
           gcloud run services replace service.yaml