diff --git a/mod4a-rundocker/requirements.txt b/mod4a-rundocker/requirements.txt
index 7bdc163..65bd6d4 100644
--- a/mod4a-rundocker/requirements.txt
+++ b/mod4a-rundocker/requirements.txt
@@ -1,3 +1,3 @@
 gunicorn==19.10.0
-flask==1.1.2
+flask==2.3.2
 google-cloud-ndb==1.9.0