diff --git a/requirements.dev.txt b/requirements.dev.txt
index 749ca596b0..e69d5efbde 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -4,6 +4,7 @@ docker==3.4.1
 locust==1.1.1
 pytest==3.2.3
 coverage==4.0.3
+gitdb2==2.0.6  # transitive, pin to avoid https://github.com/gitpython-developers/GitPython/issues/983
 gitpython==2.1.11
 google-api-python-client==1.7.8
 moto==1.3.13  # 1.3.14 does not work, possibly related to https://github.com/spulec/moto/issues/2567