diff --git a/requirements.txt b/requirements.txt
index a9df722..d48e398 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ ptyprocess==0.5.2
 py-ecc==1.4.2
 py-evm==0.2.0a12
 pycparser==2.18
-pycryptodome==3.5.1
+pycryptodome==3.6.6
 pyethash==0.1.27
 Pygments==2.2.0
 requests==2.18.4