diff --git a/setup.py b/setup.py
index 58368f22..114f40a2 100644
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@ setup(
         "certifi>=2015.11.20.1",  # no semver here - this should always be on the last release!
         "configargparse>=0.10, <0.11",
         "construct>=2.5.2, <2.6",
-        "cryptography>=1.2.2,<1.4",
+        "cryptography>=1.2.2,<1.3",
         "Flask>=0.10.1, <0.11",
         "h2>=2.1.2, <3.0",
         "hpack>=2.1.0, <3.0",