diff --git a/requirements.txt b/requirements.txt
index 65f1ae5..287965c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ colorama==0.3.7
 conda==4.4.11
 conda-build==1.18.2
 configobj==5.0.6
-cryptography==1.4
+cryptography==3.2
 cycler==0.10.0
 Cython==0.23.4
 cytoolz==0.7.4