diff --git a/zoho/requirements.txt b/zoho/requirements.txt
index 0df06bc..306ede3 100644
--- a/zoho/requirements.txt
+++ b/zoho/requirements.txt
@@ -12,5 +12,5 @@ python-dateutil==2.6.0
 pytz==2017.2
 PyYAML==3.13
 requests==2.13.0
-rsa==3.4.2
+rsa==4.1
 six==1.10.0