diff --git a/docs/_docs/installation/windows.md b/docs/_docs/installation/windows.md
index f3a5160b0d3..1a2d6a34602 100644
--- a/docs/_docs/installation/windows.md
+++ b/docs/_docs/installation/windows.md
@@ -56,7 +56,7 @@ which hosts optimized versions of Ruby for Ubuntu.
 ```sh
 sudo apt-add-repository ppa:brightbox/ruby-ng
 sudo apt-get update
-sudo apt-get install ruby2.5 ruby2.5-dev build-essential dh-autoreconf
+sudo apt-get install ruby2.5 ruby2.5-dev build-essential dh-autoreconf zlib1g-dev libgdbm-dev
 ```
 
 Next let's update our Ruby gems: