diff --git a/.gitmodules b/.gitmodules
index 48f7db3..e99ed5e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "themes/book"]
 	path = themes/book
-	url = git@github.com:alex-shpak/hugo-book.git
+	url = git://github.com/alex-shpak/hugo-book.git