diff --git a/e2e-test-server/constraints.txt b/e2e-test-server/constraints.txt
index 43589a85..4778aad9 100644
--- a/e2e-test-server/constraints.txt
+++ b/e2e-test-server/constraints.txt
@@ -18,7 +18,7 @@ grpc-google-iam-v1==0.12.6
 grpcio==1.59.0
 grpcio-status==1.59.0
 gunicorn==22.0.0
-idna==3.4
+idna==3.15
 importlib-metadata==6.8.0
 itsdangerous==2.1.2
 Jinja2==3.1.2