diff --git a/requirements.txt b/requirements.txt
index ecbd774..170e7cb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ cftime==1.0.4.2
 chardet==3.0.4
 Click==7.0
 cloudpickle==1.3.0
-cryptography==2.8
+cryptography==3.2
 cycler==0.10.0
 cytoolz==0.10.1
 dask==2.10.1