diff --git a/mdl-ref-server/requirements.txt b/mdl-ref-server/requirements.txt
index 5ab05268d..6d3d6b6fc 100644
--- a/mdl-ref-server/requirements.txt
+++ b/mdl-ref-server/requirements.txt
@@ -3,7 +3,7 @@ cbor==1.0.0
 certifi==2023.7.22
 cffi==1.14.5
 chardet==4.0.0
-cryptography==41.0.3
+cryptography==41.0.4
 idna==2.10
 Naked==0.1.31
 pycparser==2.20