diff --git a/requirements.txt b/requirements.txt
index 8a9b2b06..760ced18 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ click==6.7
 cloudpickle==0.5.5
 colorama==0.3.9
 contextlib2==0.5.5
-cryptography==2.3.1
+cryptography==39.0.1
 Cython==0.28.5
 cytoolz==0.9.0.1
 dask==0.19.0