diff --git a/rebar.config b/rebar.config
index a058707..fd6c660 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,5 +1,5 @@
 {deps, [
-    {proper, ".*", {git, "https://github.com/manopapad/proper.git", "master"}}
+    {proper, ".*", {git, "git://github.com/manopapad/proper.git", "master"}}
 ]}.
 
 {port_specs, [{"priv/jiffy.so", ["c_src/*.c"]}]}.