diff --git a/setup.cfg b/setup.cfg
index b8d72bfe800a7488782141199fa951121551f424..2ee2c9ba5630967deaa459d307f867c537132cb7 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,15 +2,15 @@
 [metadata]
 version = 2.2
 name = minijson
-long-description = file: README.md
-long-description-content-type = text/markdown; charset=UTF-8
+long_description = file: README.md
+long_description_content_type = text/markdown; charset=UTF-8
 author = Piotr Maślanka
 license_files =
     LICENSE
 author_email = piotr.maslanka@dronehub.ai
 description = A library for serializing JSON in a small binary format
 url = https://github.com/Dronehub/minijson
-project-urls =
+project_urls =
     Documentation = https://minijson.readthedocs.io/
 	Code = https://github.com/Dronehub/minijson
 	Issue tracker = https://github.com/Dronehub/minijson/issues