diff --git a/setup.py b/setup.py
index 27122725..7f22a502 100644
--- a/setup.py
+++ b/setup.py
@@ -107,7 +107,7 @@
   install_requires = ['six>=1.11.0', 'subprocess32; python_version < "3"'],
   extras_require = {
       'colors': ['colorama>=0.3.9'],
-      'crypto:python_version < "3"': ['cryptography>=3.3.2,<3.5'],
+      'crypto:python_version < "3"': ['cryptography>=3.3.2,<3.4'],
       'crypto:python_version >= "3"': ['cryptography>=3.3.2'],
       'pynacl': ['pynacl>1.2.0']},
   tests_require = 'mock; python_version < "3.3"',