diff --git a/.gitmodules b/.gitmodules
index 5951351..a9a8d24 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "book/external/Nested-Books"]
 	path = book/external/Nested-Books
-	url = git@github.com:TeachBooks/Nested-Books.git
+	url = https://github.com/TeachBooks/Nested-Books.git
\ No newline at end of file