diff --git a/README.md b/README.md
index d0f65be..3378b9e 100644
--- a/README.md
+++ b/README.md
@@ -139,7 +139,7 @@ But what about
 
 I think it is so slow, 'cause we need to solve 2 2 +, then 4 2 +, then 6 2 +
 
-SO, i parses it to RPN differently
+SO, I parses it to RPN differently
 
 I just add some brackets to expression