diff --git a/content/ide-and-linters.md b/content/ide-and-linters.md
index 3051f3f..83b7b95 100644
--- a/content/ide-and-linters.md
+++ b/content/ide-and-linters.md
@@ -50,6 +50,9 @@ And check that your `~/.emacs` file has:
 (cask-initialize)
 ```
 
+After adding dependencies to your `Cask` file, run `cask install` in
+that directory.
+
 #### exec-path-from-shell
 
 On MacOS X you will also need