1 files changed, 1 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index a16e690..bcb2f48 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ extras =
 deps =
     coverage>=4.2
     cryptographyMaster: git+https://github.com/pyca/cryptography.git
-    cryptographyMinimum: cryptography<=1.9
+    cryptographyMinimum: cryptography==2.1.4
 setenv =
     # Do not allow the executing environment to pollute the test environment
     # with extra packages.