diff --git a/pyproject.toml b/pyproject.toml
index 8f3b94e..178ebf7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ packages = [{include = "async_websocket_pool"}]
 
 [tool.poetry.dependencies]
 python = "^3.10"
-websockets = "^11.0.3"
+websockets = ">=11.0.3,<13.0.0"
 
 [tool.poetry.group.dev.dependencies]
 pytest = ">=7.3.1,<9.0.0"