diff --git a/README.md b/README.md
index 73387a3..5288e39 100644
--- a/README.md
+++ b/README.md
@@ -356,7 +356,7 @@ Hello Alice!
 
 ## Cocona in action
 
-### Paramter set
+### Parameter set
 Cocona has a mechanism called Parameter set that defines common parameters for multiple commands.
 For example, if every command receives a user name, host name, etc., it would be annoying to define them in a method for each command.