diff --git a/requirements.txt b/requirements.txt
index 0e060a1..7e6629c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ pylint==1.8.2
 pytz==2018.3
 PyYAML==3.12
 requests==2.18.4
-rsa==3.4.2
+rsa==4.1
 scipy==1.1.0
 sgf==0.5
 six==1.11.0