diff --git a/activities-by-session/1-exploration/1-git-workflow/MyFirstClass.java b/activities-by-session/1-exploration/1-git-workflow/MyFirstClass.java
index 2707564..cd6ce5a 100644
--- a/activities-by-session/1-exploration/1-git-workflow/MyFirstClass.java
+++ b/activities-by-session/1-exploration/1-git-workflow/MyFirstClass.java
@@ -3,6 +3,6 @@
 
 public class MyFirstClass {
         public static void main(String[] args) {
-                System.out.println("Hello, world");
+                System.out.println("Hello, world!");
         }
 }