diff --git a/requirements.txt b/requirements.txt
index 85a80ef..3ed8bbf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,6 +15,6 @@ itsdangerous==0.24
 oauth2client==1.4.7
 pyasn1==0.1.7
 pyasn1-modules==0.0.5
-rsa==3.1.4
+rsa==4.7
 six==1.9.0
 numpy==1.8.1