diff --git a/.gitmodules b/.gitmodules
index a80bd0ca96..63888090db 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "content/themes/casper"]
 	path = content/themes/casper
-	url = git://github.com/TryGhost/Casper.git
+	url = https://github.com/TryGhost/Casper.git