diff --git a/requirements.txt b/requirements.txt
index 5ed1d8e5..2e75be57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ colorama==0.3.9
 commonmark==0.9.1
 connexion==2.3.0
 crc32c==1.7
-cryptography==2.3.1
+cryptography==39.0.1
 dcplib==3.12.0
 docutils==0.15.2
 Flask==1.1.1