diff --git a/requirements/adapter.txt b/requirements/adapter.txt
index 091210722..002b81b0a 100644
--- a/requirements/adapter.txt
+++ b/requirements/adapter.txt
@@ -27,5 +27,5 @@ starlette>=0.19.1,<0.45; python_version<"3.9"
 starlette>=0.49.3,<1; python_version>="3.9"
 tornado>=6,<7
 uvicorn<1                                # The oldest version can vary among Python runtime versions
-gunicorn>=20,<24
+gunicorn>=23.0.0,<24
 websocket_client>=1.2.3,<2               # Socket Mode 3rd party implementation