diff --git a/.gitmodules b/.gitmodules
index dc385e8..2524d71 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,4 @@
 [submodule "kyupy"]
 	path = kyupy
-	url = git@git.vlab.cse.kyutech.ac.jp:stefan/kyupy.git
+	url = https://git.vlab.cse.kyutech.ac.jp/stefan/kyupy.git
 	branch = devel