diff --git a/setup.py b/setup.py
index 0aab0bcff..17148f147 100755
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ def get_version():
 install_requires = [
     "boto3>=1.9.201",
     "botocore>=1.12.201",
-    "cryptography>=2.3.0",
+    "cryptography>=3.3.1",
     "requests>=2.5",
     "xmltodict",
     "six>1.9",