diff --git a/free-programming-books-de.md b/free-programming-books-de.md
index efd4ad2a520a05053f9ebe3e16e5503908ef36e0..e439bbe5697bc761505e277e77fffd50c8b07a69 100644
--- a/free-programming-books-de.md
+++ b/free-programming-books-de.md
@@ -3,8 +3,8 @@
 * [iOS](#ios)
 * [Java](#java)
 * [Python](#python)
-* [Ruby on Rails](#rubyonrails)
-* [Visual Basic](#visualbasic)
+* [Ruby on Rails](#ruby on rails)
+* [Visual Basic](#visual basic)
 
 ###Android