diff --git a/README.md b/README.md
index 0d5006c5f..6f9e7dee3 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Please read [CONTRIBUTING](CONTRIBUTING.md). If you're new to GitHub, [welcome](
 + [Finnish / suomi / suomen kieli](books/free-programming-books-fi.md)
 + [French / français](books/free-programming-books-fr.md)
 + [German / Deutsch](books/free-programming-books-de.md)
-+ [Greek / ελληνικά](books/free-programming-books-gr.md)
++ [Greek / ελληνικά](books/free-programming-books-el.md)
 + [Hebrew / עברית](books/free-programming-books-he.md)
 + [Hungarian / magyar / magyar nyelv](books/free-programming-books-hu.md)
 + [Indonesian / Bahasa Indonesia](books/free-programming-books-id.md)
diff --git a/books/free-programming-books-gr.md b/books/free-programming-books-el.md
similarity index 100%
rename from books/free-programming-books-gr.md
rename to books/free-programming-books-el.md