diff --git a/testing/requirements.txt b/testing/requirements.txt
index 925321f69d9..15d3d302b16 100644
--- a/testing/requirements.txt
+++ b/testing/requirements.txt
@@ -14,5 +14,5 @@ webapp2==2.5.2
 google-api-python-client==1.7.8
 google-cloud-core==0.29.1
 gcp-devrel-py-tools==0.0.15
-flask==1.0.2
+flask==2.2.5
 websocket-client==0.54.0