diff --git a/.gitignore b/.gitignore
index 2773be5d3..e82e8f786 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ working.png
 ruby/.rails5-gems
 web/.rails5-gems
 websocket-gateway/.rails5-gems
+.pg_data/