diff --git a/rebar.config b/rebar.config
index 6b037b1..ded76c0 100644
--- a/rebar.config
+++ b/rebar.config
@@ -5,6 +5,8 @@
        {proper, "", {git, "https://github.com/manopapad/proper.git", {branch, master}}}
        ]}.
 
+{erl_first_files, ["ec_dictionary"]}.
+
 {erl_opts,
  [debug_info,
   warnings_as_errors]}.