diff --git a/collaborative_whiteboard/.gitignore b/collaborative_whiteboard/.gitignore
index b63da4551b2e169d28b20728d5d53c6ca1779da4..e8af380fb9bf73b098a2dbaa58ab9c946dbb1716 100644
--- a/collaborative_whiteboard/.gitignore
+++ b/collaborative_whiteboard/.gitignore
@@ -1,5 +1,8 @@
 .gradle
 build/
+out/
+www/public
+*.class
 !gradle/wrapper/gradle-wrapper.jar
 !**/src/main/**/build/
 !**/src/test/**/build/