diff --git a/requirements.txt b/requirements.txt
index 50a7927..0999da6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 aniso8601==1.2.0
 Flask==0.12.1
-cryptography==2.1.4
-pyOpenSSL==17.0.0
+cryptography==2.3.1
+pyOpenSSL==18.0.0
 PyYAML==3.12
 six==1.11.0