diff --git a/pyproject.toml b/pyproject.toml
index 6e4ae2ad1b072313c23fc748499bb05bd99c7cf4..e75775a39019d29b66809d940a78358b0f696af6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ test = ['pytest', 'pytest-cov']
 doc = ['sphinx==5.0', 'numpydoc', 'sphinx_gallery', "sphinx_rtd_theme"]
 
 [project.urls]
-"Sources = 'https://github.com/multi-learn/summit'
+"Sources" = 'https://github.com/multi-learn/summit'
 Documentation  = 'https://multi-learn.github.io/summit/'
 "Bug Tracker" = '"https://github.com/multi-learn/summit/issues'