diff --git a/tests/testapp/Dockerfile b/tests/testapp/Dockerfile
index 3a146d7b..1042c462 100644
--- a/tests/testapp/Dockerfile
+++ b/tests/testapp/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:2.7.10
+FROM python:3.11
 
 LABEL maintainer="developers@optimizely.com"
 
diff --git a/tests/testapp/requirements.txt b/tests/testapp/requirements.txt
index 46a48dd9..4b70123b 100644
--- a/tests/testapp/requirements.txt
+++ b/tests/testapp/requirements.txt
@@ -1 +1 @@
-Flask==1.1.2
+Flask==2.2.5