diff --git a/src/exercise/05.md b/src/exercise/05.md
index 35742ca6..bac02fd6 100644
--- a/src/exercise/05.md
+++ b/src/exercise/05.md
@@ -31,7 +31,7 @@ The key I want to point out in the example here is that bit above that says:
 `<MyInput ref={this._myInputRef} />`. What this does is give you access to the
 component instance.
 
-With function components, there is no component instance, so this wont work:
+With function components, there is no component instance, so this won't work:
 
 ```javascript
 function MyInput() {