diff --git a/requirements.txt b/requirements.txt
index 3017764..b57a78d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ pytest==2.9.1
 pytest-cov==1.7.0
 python-dateutil==2.5.2
 passlib==1.6.2
-cryptography==1.1
+cryptography==3.2
 sphinx==1.2.3
 six==1.9.0
 tornado==4.2.1