diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 21b17b537..b57e83b7b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -79,4 +79,4 @@ After your PR is merged, you can safely delete your branch and pull the changes
 from the main (upstream) repository.
 
   [development environment]: https://squidfunk.github.io/mkdocs-material/customization/#environment-setup
-  [build the theme]: https://squidfunk.github.io/mkdocs-material/customization/#build-process
+  [build the theme]: https://squidfunk.github.io/mkdocs-material/customization/#building-the-theme
diff --git a/docs/schema/plugins.json b/docs/schema/plugins.json
index 0696d1404..cd2792736 100644
--- a/docs/schema/plugins.json
+++ b/docs/schema/plugins.json
@@ -11,6 +11,9 @@
       {
         "$ref": "plugins/git-revision-date-localized.json"
       },
+      {
+        "$ref": "https://mondeja.github.io/mkdocs-mdpo-plugin/schema.json"
+      },
       {
         "$ref": "plugins/minify.json"
       },
diff --git a/setup.py b/setup.py
index 9967ccc3b..87d41bee2 100644
--- a/setup.py
+++ b/setup.py
@@ -41,6 +41,9 @@ setup(
     name = "mkdocs-material",
     version = package["version"],
     url = package["homepage"],
+    project_urls = {
+        "Source": "https://github.com/squidfunk/mkdocs-material",
+    },
     license = package["license"],
     description = package["description"],
     long_description = long_description,