diff --git a/setup.cfg b/setup.cfg
index 4ab8aff..5679eb6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,4 +27,18 @@ classifiers =
 python_requires = >=3.6, <4
 package_dir =
     =clog
-zip_safe = no
\ No newline at end of file
+zip_safe = no
+
+[options.extra_require]
+testing =
+    pytest>=7.0
+    pytest-cov>=3.0
+    mypy>=0.950
+    flake8>=4.0
+    tox>=3.25
+
+[options.package_data]
+clog = py.typed
+
+[flake8]
+max-line-length = 120
\ No newline at end of file