diff --git a/README.md b/README.md
index e4122b4..2559178 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,4 @@ The lab manual are developed by Dr. Frank Xu wxu@ubalt.edu. Email me if you have
 
 ## The lab materials are free for educational purposes. Just simply email me your name and institutions. 
 
-## Let me know if you have lab materials to share.
+Let me know if you have lab materials to share.