diff --git a/aio/content/tutorial/toh-pt6.md b/aio/content/tutorial/toh-pt6.md
index 36d7294e38..ab845893ad 100644
--- a/aio/content/tutorial/toh-pt6.md
+++ b/aio/content/tutorial/toh-pt6.md
@@ -43,10 +43,12 @@ If you're _coding along_ with this tutorial, stay here and add the *In-memory We
 
 </div>
 
-Install the *In-memory Web API* package from _npm_
+Install the *In-memory Web API* package from _npm_.
+
+**Note:** This package's version is locked to `v0.5` to maintain compatibility with the current release of `@angular/cli`.
 
 <code-example language="sh" class="code-shell">
-  npm install angular-in-memory-web-api --save
+  npm install angular-in-memory-web-api@0.5 --save
 </code-example>
 
 Import the `InMemoryWebApiModule` and the `InMemoryDataService` class,