diff --git a/1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/task.md b/1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/task.md
index 9ebb7abf..a3843107 100644
--- a/1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/task.md
+++ b/1-js/06-advanced-functions/09-call-apply-decorators/01-spy-decorator/task.md
@@ -27,4 +27,4 @@ for (let args of work.calls) {
 }
 ```
 
-P.S. That decorator is sometimes useful for unit-testing, it's advanced form is `sinon.spy` in [Sinon.JS](http://sinonjs.org/) library.
+P.S. That decorator is sometimes useful for unit-testing. Its advanced form is `sinon.spy` in [Sinon.JS](http://sinonjs.org/) library.