diff --git a/docs/requirements.txt b/docs/requirements.txt
deleted file mode 100644
index e05a37b0..00000000
--- a/docs/requirements.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-PyQt5
-sphinx
-sphinxcontrib-apidoc
-sphinx-codeautolink
-sphinx-copybutton
-sphinx-hoverxref
-sphinx-rtd-theme
-sphinx-toolbox
-sphinx-qt-documentation
diff --git a/pyproject.toml b/pyproject.toml
index e1288b5e..b3aa99ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ authors = [
 ]
 description = "Ribbon Bar for PyQt or PySide applications"
 readme = "README.md"
-dynamic = ["version", "dependencies", "optional-dependencies"]
+dynamic = ["version"]
 requires-python = ">=3.8"
 classifiers = [
     "Programming Language :: Python",
@@ -26,28 +26,44 @@ classifiers = [
     "Operating System :: OS Independent",
     "Development Status :: 4 - Beta",
 ]
+dependencies = ["numpy", "qtpy"]
 
 [project.urls]
 "GitHub" = "https://github.com/haiiliin/pyqtribbon"
 "Documentation" = "https://pyqribbon.readthedocs.io/en/stable/"
 
+[project.optional-dependencies]
+dev = [
+    "coveralls",
+    "coverage",
+    "flake8",
+    "pytest",
+    "pytest-cov",
+    "pytest-qt",
+    "tox",
+]
+docs = [
+    "PyQt5",
+    "sphinx",
+    "sphinxcontrib-apidoc",
+    "sphinx-codeautolink",
+    "sphinx-copybutton",
+    "sphinx-hoverxref",
+    "sphinx-rtd-theme",
+    "sphinx-toolbox",
+    "sphinx-qt-documentation",
+]
+pyqt5 = ["PyQt5"]
+pyqt6 = ["PyQt6"]
+pyside2 = ["PySide2"]
+pyside6 = ["PySide6"]
+
 [tool.setuptools]
 packages = ['pyqtribbon']
 
 [tool.setuptools.package-data]
 pyqtribbon = ["icons/*", "styles/*"]
 
-[tool.setuptools.dynamic.dependencies]
-file = ["requirements/deps.txt"]
-
-[tool.setuptools.dynamic.optional-dependencies]
-dev.file = ["requirements/dev.txt"]
-docs.file = ["docs/requirements.txt"]
-PyQt5.file = ["requirements/PyQt5.txt"]
-PyQt6.file = ["requirements/PyQt6.txt"]
-PySide2.file = ["requirements/PySide2.txt"]
-PySide6.file = ["requirements/PySide6.txt"]
-
 [tool.setuptools_scm]
 root = "."
 version_scheme = "post-release"
diff --git a/requirements/PyQt5.txt b/requirements/PyQt5.txt
deleted file mode 100644
index 2d07ca02..00000000
--- a/requirements/PyQt5.txt
+++ /dev/null
@@ -1 +0,0 @@
-PyQt5
diff --git a/requirements/PyQt6.txt b/requirements/PyQt6.txt
deleted file mode 100644
index ee397a46..00000000
--- a/requirements/PyQt6.txt
+++ /dev/null
@@ -1 +0,0 @@
-PyQt6
diff --git a/requirements/PySide2.txt b/requirements/PySide2.txt
deleted file mode 100644
index 2cea4384..00000000
--- a/requirements/PySide2.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-PySide2; python_version < "3.11"
-PySide6; python_version >= "3.11"
diff --git a/requirements/PySide6.txt b/requirements/PySide6.txt
deleted file mode 100644
index 7fa34f07..00000000
--- a/requirements/PySide6.txt
+++ /dev/null
@@ -1 +0,0 @@
-PySide6
diff --git a/requirements/deps.txt b/requirements/deps.txt
deleted file mode 100644
index 09201a6c..00000000
--- a/requirements/deps.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-numpy
-qtpy
diff --git a/requirements/dev.txt b/requirements/dev.txt
deleted file mode 100644
index fd1ab388..00000000
--- a/requirements/dev.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-coveralls
-coverage
-flake8
-pytest
-pytest-cov
-pytest-qt
-tox
diff --git a/tox.ini b/tox.ini
index 04cd451c..288f6a47 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,9 +4,9 @@ envlist = py{38,39,310,311,312}-{PyQt5,PyQt6,PySide6}
 [testenv]
 extras =
     dev
-    PyQt5: PyQt5
-    PyQt6: PyQt6
-    PySide6: PySide6
+    PyQt5: pyqt5
+    PyQt6: pyqt6
+    PySide6: pyside6
 commands =
     pytest
 setenv=