diff --git a/.gitignore b/.gitignore
index 3d4420d7c..961807092 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@ pids
 *.pid
 *.seed
 *.pid.lock
+data/acknowledgements.json
 
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov