diff --git a/mod1b-flask/requirements.txt b/mod1b-flask/requirements.txt
index c661cf7..600f3db 100644
--- a/mod1b-flask/requirements.txt
+++ b/mod1b-flask/requirements.txt
@@ -1,2 +1,2 @@
-flask==1.1.2
+flask==2.3.2
 appengine-python-standard