diff --git a/reqs/dev-requirements.txt b/reqs/dev-requirements.txt
index 6bb677154..2f8d594d5 100644
--- a/reqs/dev-requirements.txt
+++ b/reqs/dev-requirements.txt
@@ -16,6 +16,7 @@ dill>=0.3.6
 statsmodels
 flaky
 Jinja2
+joblib
 
 # ex: `py.test` in the docs/ folder. See conftest.py in docs/ first
 sybil