diff --git a/.gitmodules b/.gitmodules
index 7fb85a4d7..7b51db126 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,4 +3,4 @@
 	url = https://github.com/yangshun/front-end-interview-handbook
 [submodule "top-javascript-interview-questions"]
 	path = top-javascript-interview-questions
-	url = https://github.com/yangshun/top-javascript-interview-questions
+	url = https://github.com/yangshun/top-javascript-interview-questions/
diff --git a/top-javascript-interview-questions b/top-javascript-interview-questions
new file mode 160000
index 000000000..18afbe9b2
--- /dev/null
+++ b/top-javascript-interview-questions
@@ -0,0 +1 @@
+Subproject commit 18afbe9b2b1779e0a863981fbbbb843d47b0e96d