diff --git a/README.md b/README.md
index 29e1abb..d2f30c6 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ Set
 ```
 
 ### Frozenset
-####Is hashable and can be used as a key in dictionary.
+#### Is hashable and can be used as a key in dictionary.
 ```python
 <frozenset> = frozenset(<collection>)
 ```