diff --git a/authn-service/requirements.txt b/authn-service/requirements.txt
index 96f4ca2..774850c 100644
--- a/authn-service/requirements.txt
+++ b/authn-service/requirements.txt
@@ -2,7 +2,7 @@ asn1crypto==0.24.0
 certifi==2020.6.20
 chardet==3.0.4
 click==7.1.2
-cryptography==2.6.1
+cryptography==42.0.0
 entrypoints==0.3
 Flask==1.1.2
 Flask-Cors==3.0.8