diff --git a/README.md b/README.md
index 52d78953241527cd90606a332bee559ca4465623..320d62b10cb5b22d33eece4bcb8df7f0fe3c6f8d 100644
--- a/README.md
+++ b/README.md
@@ -2,3 +2,8 @@
 
  * https://docs-new.it4i.cz - master branch
  * https://docs-new.it4i.cz/devel/$BRANCH_NAME - maps the branches
+
+# URLs
+
+ * http://facelessuser.github.io/pymdown-extensions/
+ * http://squidfunk.github.io/mkdocs-material/