diff --git a/contrib_bots/lib/readme.md b/contrib_bots/lib/readme.md
index ab71c14..a0b2dea 100644
--- a/contrib_bots/lib/readme.md
+++ b/contrib_bots/lib/readme.md
@@ -1,7 +1,7 @@
 # Overview
 
 This is the documentation for an experimental new system for writing
-bots that react the messages.
+bots that react to messages.
 
 This directory contains library code for running Zulip
 bots that react to messages sent by users.