diff --git a/.gitmodules b/.gitmodules
index a11a4bea25a..ac347cc39ca 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "docs"]
 	path = docs
-	url = git@github.com:EC-CUBE/eccube3-doc.git
+	url = https://github.com/EC-CUBE/eccube3-doc.git