diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..0254322
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+pygame==2.0.1
diff --git a/spaceinvaders.py b/spaceinvaders.py
index 96d43ec..6b7e5be 100755
--- a/spaceinvaders.py
+++ b/spaceinvaders.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Space Invaders
 # Created by Lee Robinson