diff --git a/modules/history-substring-search/README.md b/modules/history-substring-search/README.md
index f8ab5b1..3622606 100644
--- a/modules/history-substring-search/README.md
+++ b/modules/history-substring-search/README.md
@@ -3,10 +3,15 @@ History-Substring-Search
 
 Allows for fish shell-like searching of history with UP and DOWN.
 
-The options set explicitly by init.zsh are the default options, and are only set for consistancy.
-
 ![example][fish_shell]
 
+This module requires the [input](https://github.com/Eriner/zim/blob/master/modules/input/README.md) module. Without it, you may experience odd behavior.
+Put 'input' in the first line and 'history-substring-search' on the second line of `zmodules` in your `.zimrc`.
+
+Additionally, if you use [syntax-highlighting](https://github.com/Eriner/zim/blob/master/modules/syntax-highlighting/README.md), place 'syntax-highlighting' before 'history-substring-search' on the second line of `zmodules` in your `.zimrc`.
+
+The options set explicitly by init.zsh are the default options, and are only set for consistancy.
+
 Functionality is sourced from [history-substring-search](https://github.com/zsh-users/zsh-history-substring-search)
 
 Contributing