diff --git a/setup.py b/setup.py
index e2dfcaf..307a593 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
 ] + tests_requires
 
 install_flask_requires = [
-    "flask>=1,<2",
+    "flask>=1,<3",
 ]
 
 install_sanic_requires = [