diff --git a/frontend_multi_user/pyproject.toml b/frontend_multi_user/pyproject.toml
index 8215eea5..3a5d824e 100644
--- a/frontend_multi_user/pyproject.toml
+++ b/frontend_multi_user/pyproject.toml
@@ -9,7 +9,7 @@ dependencies = [
     "flask-login==0.6.3",
     "flask-sqlalchemy==3.1.1",
     "flask-wtf==1.3.0",
-    "authlib==1.8.0",
+    "authlib==1.9.1",
     "psycopg2-binary==2.9.12",
     "requests==2.34.2",
     "stripe==15.6.1",