diff --git a/git-to-s3/requirements.txt b/git-to-s3/requirements.txt
index 979f47a..dd76d01 100644
--- a/git-to-s3/requirements.txt
+++ b/git-to-s3/requirements.txt
@@ -3,7 +3,7 @@ boto3==1.4.4
 botocore==1.5.30
 docutils==0.13.1
 gitdb2==2.0.0
-GitPython==2.1.3
+GitPython==3.1.37
 jmespath==0.9.2
 packaging==16.8
 pyparsing==2.2.0