diff --git a/Lab004.md b/Lab004.md
index 680b8db..eb8eeef 100644
--- a/Lab004.md
+++ b/Lab004.md
@@ -6,7 +6,7 @@ We will cover:
 1. Parser combinators
 
 Write "Reverse Polish notation calculator". Program runs forever where it:
-1. promts user for the input expression (written in [Reverse Polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation)
+1. promts user for the input expression (written in [Reverse Polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation))
 2. reads user input
 3. evaluates user input:
 a) if it is a valid expression, it will evaluate its value