diff --git a/boulder-dash/.gitignore b/boulder-dash/.gitignore
index f6df409a..80fc7e3b 100644
--- a/boulder-dash/.gitignore
+++ b/boulder-dash/.gitignore
@@ -1,2 +1,5 @@
+/classes/
 /bin/
 /out/
+/lib/
+/.attach_pid*
\ No newline at end of file