diff --git a/dev-requirements.txt b/dev-requirements.txt
index e38672c..04a9359 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -38,6 +38,7 @@ nbformat==5.1.3
 nest-asyncio==1.5.1
 notebook==6.4.0
 numpy==1.20.3
+-e git+https://github.com/banditml/offline-policy-evaluation.git@2e8035273e6d7533c801c4dee874f178bfda1541#egg=offline_evaluation
 packaging==20.9
 pandas==1.1.5
 pandocfilters==1.4.3