diff --git a/pyproject.toml b/pyproject.toml
deleted file mode 100644
index 2898ba7..0000000
--- a/pyproject.toml
+++ /dev/null
@@ -1,6 +0,0 @@
-[build-system]
-requires = [
-    "setuptools >= 62.6.0",
-    "wheel >= 0.29.0",
-]
-build-backend = "setuptools.build_meta"
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index b058924..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-aiohttp==3.8.3
diff --git a/setup.cfg b/setup.cfg
index 275dfd0..fd67190 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = edge-tts
-version = 5.0.3
+version = 5.0.4
 author = rany
 author_email = ranygh@riseup.net
 description = Microsoft Edge's TTS
@@ -19,7 +19,8 @@ package_dir=
     = src
 packages = find:
 python_requires = >=3.7
-install_requires = file: requirements.txt
+install_requires =
+    aiohttp==3.8.3
 
 [options.packages.find]
 where=src