diff --git a/requirements.txt b/requirements.txt
index 1b167433..add187bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,4 +12,4 @@ aiocache
 ujson
 aiomcache
 authlib
-gunicorn
+gunicorn==19.9.0
diff --git a/setup.py b/setup.py
index ab7b6dae..433eeea5 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,7 @@
           'Programming Language :: Python :: 3.7',
       ],
       install_requires=['aiohttp', 'asyncpg', 'authlib',
-                        'jsonschema', 'gunicorn'],
+                        'jsonschema', 'gunicorn==19.9.0'],
       extras_require={
           'test': ['coverage', 'pytest', 'pytest-cov',
                    'coveralls', 'testfixtures', 'tox',