diff --git a/requirements.txt b/requirements.txt
index 7d1aeba..ac794a5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ colorama==0.3.7
 conda==4.3.17
 configobj==5.0.6
 contextlib2==0.5.4
-cryptography==1.7.1
+cryptography==3.2
 cycler==0.10.0
 Cython==0.25.2
 cytoolz==0.8.2