diff --git a/setup.py b/setup.py
index bbbac95e3..ecaea492b 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@ setup(
         "click>=6.2, <7",
         "certifi>=2015.11.20.1",  # no semver here - this should always be on the last release!
         "construct>=2.8, <2.9",
-        "cryptography>=1.3, <1.8",
+        "cryptography>=1.3, <1.9",
         "cssutils>=1.0.1, <1.1",
         "h2>=2.5.1, <3",
         "html2text>=2016.1.8, <=2016.9.19",