diff --git a/requirements.txt b/requirements.txt
index b8558cc..0c42ac7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 coverage==4.5.1
 git-pull-request==3.0.1
 gitdb2==2.0.5
-GitPython==2.1.1
+GitPython==3.1.34
 google-api-core==1.7.0
 google-auth-oauthlib==0.3.0
 google-auth==1.5.1