diff --git a/app/appengine/README.md b/app/appengine/README.md
index 47dd42e..d4330d9 100644
--- a/app/appengine/README.md
+++ b/app/appengine/README.md
@@ -20,11 +20,11 @@
 
 ```sh
 gcloud config set project golang-org
-gcloud app deploy app.yaml
+GO111MODULE=on gcloud app deploy app.yaml
 ```
 
 or, to not affect your gcloud state, use:
 
 ```
-gcloud app --account=username@google.com --project=golang-org deploy app.yaml
+GO111MODULE=on gcloud app --account=username@google.com --project=golang-org deploy app.yaml
 ```