diff --git a/hello_world.py b/hello_world.py
index f7bdb61..17686e6 100644
--- a/hello_world.py
+++ b/hello_world.py
@@ -1,4 +1,4 @@
 #!/usr/bin/env python
 
-print("Hello world!")
-print("Hello again!")
+print("Hello world.")
+print("Hello again.")