diff --git a/requirements.txt b/requirements.txt
index 96137a5..34d66ff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ cffi==1.12.3
 chardet==3.0.4
 conda==4.6.14
 conda-build==3.17.8
-cryptography==2.6.1
+cryptography==39.0.1
 cycler==0.10.0
 Cython==0.29.7
 decorator==4.4.0