diff --git a/doc/install/installation.md b/doc/install/installation.md
index d844140a67830e7cf057681a910ba82ce360fa0e..5ba338ba7d1d92d92db677a3a68be5cbb849eb95 100644
--- a/doc/install/installation.md
+++ b/doc/install/installation.md
@@ -155,9 +155,10 @@ page](https://golang.org/dl).
 ## 4. Node
 
 Since GitLab 8.17, GitLab requires the use of node >= v4.3.0 to compile
-javascript assets and yarn >= v0.17.0 to manage javascript dependencies. In
-many distros the versions provided by the official package repositories are
-out of date, so we'll need to install through the following commands:
+javascript assets, and starting in GitLab 9.0, yarn >= v0.17.0 is required to
+manage javascript dependencies. In many distros the versions provided by the
+official package repositories are out of date, so we'll need to install through
+the following commands:
 
     # install node v7.x
     curl --location https://deb.nodesource.com/setup_7.x | bash -