diff --git a/contrib/buildbot/requirements.txt b/contrib/buildbot/requirements.txt
index c56c0b0c5..c4baac26d 100644
--- a/contrib/buildbot/requirements.txt
+++ b/contrib/buildbot/requirements.txt
@@ -1,6 +1,7 @@
+deepmerge
 mock
 flask
 pyyaml
 requests
 responses
 slackclient