diff --git a/good-commit-message.md b/good-commit-message.md
index 20a0d42..f4803d6 100644
--- a/good-commit-message.md
+++ b/good-commit-message.md
@@ -3,3 +3,4 @@
 add your tip
 
 - Start a commit message with a verb eg. `add`, `change` etc
+- Limit the subject line to 50 characters