diff --git a/README.md b/README.md
index fb39ca5..9528a27 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,6 @@
 
 # A Python SDK for OBS Studio WebSocket v5.0
 
-This is a wrapper around OBS Websocket.
 Not all endpoints in the official documentation are implemented.
 
 ## Requirements
@@ -13,7 +12,7 @@ Not all endpoints in the official documentation are implemented.
 -   [OBS Studio](https://obsproject.com/)
 -   [OBS Websocket v5 Plugin](https://github.com/obsproject/obs-websocket/releases/tag/5.0.0)
     -   With the release of OBS Studio version 28, Websocket plugin is included by default. But it should be manually installed for earlier versions of OBS.
--   Python 3.10 or greater
+-   Python 3.9 or greater
 
 ### How to install using pip
 
diff --git a/obsws_python/version.py b/obsws_python/version.py
index d28b3dd..d619c75 100644
--- a/obsws_python/version.py
+++ b/obsws_python/version.py
@@ -1 +1 @@
-version = "1.3.0"
+version = "1.4.0"
diff --git a/pyproject.toml b/pyproject.toml
index 812c68a..287fdf5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ dynamic = ["version"]
 description = "A Python SDK for OBS Studio WebSocket v5.0"
 readme = "README.md"
 license = "GPL-3.0-only"
-requires-python = ">=3.10"
+requires-python = ">=3.9"
 authors = [
     { name = "Adem Atikturk", email = "aatikturk@gmail.com" },
 ]
@@ -37,7 +37,18 @@ include = [
 ]
 
 [tool.hatch.envs.e.scripts]
-events = "py {root}\\examples\\events\\."
-hotkeys = "py {root}\\examples\\hotkeys\\."
-levels = "py {root}\\examples\\levels\\."
-scene_rotate = "py {root}\\examples\\scene_rotate\\."
+events = "python {root}\\examples\\events\\."
+hotkeys = "python {root}\\examples\\hotkeys\\."
+levels = "python {root}\\examples\\levels\\."
+scene_rotate = "python {root}\\examples\\scene_rotate\\."
+
+[tool.hatch.envs.test]
+dependencies = [
+  "pytest",
+]
+
+[tool.hatch.envs.test.scripts]
+run = 'pytest -v'
+
+[[tool.hatch.envs.test.matrix]]
+python = ["39", "310", "311"]
diff --git a/setup.py b/setup.py
index 4b369e1..b157c07 100644
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@ EXTRAS_REQUIRE = {
 }
 
 # Python version requirement
-PYTHON_REQUIRES = ">=3.10"
+PYTHON_REQUIRES = ">=3.9"
 
 setup(
     name=PACKAGE_NAME,