diff --git a/k8s/deploy.amane-frontend.yaml b/k8s/deploy.amane-frontend.yaml
index c6c38e6..5f07538 100644
--- a/k8s/deploy.amane-frontend.yaml
+++ b/k8s/deploy.amane-frontend.yaml
@@ -24,6 +24,6 @@ spec:
             containerPort: 3000
         env:
           - name: WDS_SOCKET_PORT
-            value: 0
+            value: '0'
       imagePullSecrets:
       - name: regcred