diff --git a/setup.py b/setup.py
index 353ed6b..6c7f727 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     install_requires=[
         'arrow==0.13.0',
         'bs4==0.0.1',
-        'Flask==1.0.2',
+        'Flask==2.3.2',
         'html5validator==0.3.1',
         'pycodestyle==2.4.0',
         'pydocstyle==3.0.0',