diff --git a/.gitignore b/.gitignore
index 32858aa..9237d8c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,7 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# Greenfoot
+*.ctxt
+*.greenfoot
\ No newline at end of file