diff --git a/setup.py b/setup.py
index 1f6d092..5a96bb3 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@
       install_requires=[
             'apispec==0.27.0',
             'marshmallow==2.15.1',
-            'Flask==1.1.1',
+            'Flask==2.3.2',
       ],
       data_files=[('', ['swagger.html'])],
 )