diff --git a/.gitmodules b/.gitmodules
index f2bf7d3..e2f7d2c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,4 @@
 [submodule "api-docs"]
 	path = api-docs
 	url = https://github.com/koreanbots/api-docs
+	branch = master
diff --git a/api-docs b/api-docs
index 2ef14c2..ecf70bd 160000
--- a/api-docs
+++ b/api-docs
@@ -1 +1 @@
-Subproject commit 2ef14c2afc5d539a011a6c48401962c5ffec1073
+Subproject commit ecf70bdfed62f79c7f53a8df280b151c0224391b