diff --git a/README.md b/README.md
index 1b8d55b..5a39e10 100644
--- a/README.md
+++ b/README.md
@@ -178,7 +178,7 @@ re.split(<regex>, text, maxsplit=0)  # Use brackets in regex to keep the matches
 '\s' == [ \t\n\r\f\v]  # Whitespace
 '\w' == [a-zA-Z0-9_]   # Alphanumeric
 ```
-**Use capital letter for negation**
+**Use capital letter for negation.**
 
 
 ### Format