diff --git a/requirements.txt b/requirements.txt
index d5e7f2d9..1e4f7b1d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ cftime==1.3.1
 chardet==3.0.4
 click==7.1.2
 coards==1.0.5
-cryptography==3.3.2
+cryptography==41.0.0
 # pre-installed
 #Cython==0.27.3
 enum34==1.1.6