diff --git a/controllers/terminal/deploy/manifests/deploy.yaml.tmpl b/controllers/terminal/deploy/manifests/deploy.yaml.tmpl
index d8d116335..aafb04168 100644
--- a/controllers/terminal/deploy/manifests/deploy.yaml.tmpl
+++ b/controllers/terminal/deploy/manifests/deploy.yaml.tmpl
@@ -419,7 +419,7 @@ spec:
         - name: DOMAIN
           value: {{ .cloudDomain }}
         - name: PORT
-          value: {{ .cloudPort }}
+          value: '{{ .cloudPort }}'
         - name: SECRET_NAME
           value: {{ .wildcardCertSecretName }}
         - name: SECRET_NAMESPACE