diff --git a/requirements.txt b/requirements.txt
index 7082f37f9..4903f3c49 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 alembic>=0.7.2
 Babel>=1.3
-cryptography>=0.4 # Apache-2.0
+cryptography>=0.8 # Apache-2.0
 eventlet>=0.16.1,!=0.17.0
 iso8601>=0.1.9
 jsonschema>=2.0.0,<3.0.0