diff --git a/.gitmodules b/.gitmodules
index 035e5c4961c..e95e06940ca 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -87,13 +87,13 @@
 	url = https://github.com/mozilla/rust.git
 [submodule "src/support/alert/rust-alert"]
 	path = src/support/alert/rust-alert
-	url = git://github.com/mozilla-servo/rust-alert.git
+	url = https://github.com/mozilla-servo/rust-alert.git
 [submodule "src/support/nss/nss"]
 	path = src/support/nss/nss
-	url = git://github.com/mozilla-servo/nss.git
+	url = https://github.com/mozilla-servo/nss.git
 [submodule "src/support/nss/nspr"]
 	path = src/support/nss/nspr
-	url = git://github.com/mozilla-servo/nspr.git
+	url = https://github.com/mozilla-servo/nspr.git
 [submodule "src/support/glfw/glfw"]
 	path = src/support/glfw/glfw
 	url = https://github.com/mozilla-servo/glfw.git