diff --git a/authn-service/requirements.txt b/authn-service/requirements.txt
index 96f4ca2..404a8cc 100644
--- a/authn-service/requirements.txt
+++ b/authn-service/requirements.txt
@@ -4,7 +4,7 @@ chardet==3.0.4
 click==7.1.2
 cryptography==2.6.1
 entrypoints==0.3
-Flask==1.1.2
+Flask==2.3.2
 Flask-Cors==3.0.8
 idna==2.10
 django-two-factor-auth==1.12