diff --git a/.gitmodules b/.gitmodules
index cff1b86..375bb2e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "m4"]
 	path = m4
-	url = git://anongit.freedesktop.org/xcb/util-common-m4.git
+	url = https://gitlab.freedesktop.org/xorg/util/xcb-util-m4.git