diff --git a/requirements.txt b/requirements.txt
index f56efd1..6ffd20f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 absl-py==0.9.0
 asn1crypto==0.24.0
 astor==0.8.1
-cryptography==2.1.4
+cryptography==2.3
 cycler==0.10.0
 flatbuffers==1.11
 gast==0.2.2