diff --git a/setup.py b/setup.py
index ff5c4e8aa..7300edd18 100644
--- a/setup.py
+++ b/setup.py
@@ -87,7 +87,7 @@ setup(
         'dev': [
             "asynctest>=0.12.0",
             "flake8>=3.5, <3.6",
-            "Flask>=0.10.1, <0.13",
+            "Flask>=1.0,<1.1",
             "mypy>=0.590,<0.591",
             "pytest-asyncio>=0.8",
             "pytest-cov>=2.5.1,<3",