diff --git a/requirements.txt b/requirements.txt
index 4e7a1ba..4e7a154 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ PyYAML==3.12 # MIT
 clify==0.0.3 # MIT
 pbr==4.0.3 # Apache 2.0
 schematics==2.0.1 # BSD 3-clause
-cryptography==2.1.4 # Apache 2.0 or BSD
\ No newline at end of file
+cryptography==2.3 # Apache 2.0 or BSD
\ No newline at end of file