diff --git a/setup.py b/setup.py
index 95aef0e..f0da9d1 100644
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,6 @@
         'oauth2client==3.0.0',
         'requests_toolbelt==0.7.0',
         'python_jwt==2.0.1',
-        'pycryptodome==3.4.3'
+        'pycryptodome==3.6.6'
     ]
 )