diff --git a/requirements.txt b/requirements.txt
index 0925878..65a0772 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ pyzmq==16.0.2
 repoze.lru==0.6
 requests==2.18.4
 rlp==0.5.1
-rsa==3.4.2
+rsa==4.1
 scrypt==0.8.0
 secp256k1==0.13.2
 six==1.11.0