diff --git a/config/maps b/config/maps
deleted file mode 100644
index 8aa3993..0000000
--- a/config/maps
+++ /dev/null
@@ -1 +0,0 @@
-maps:keys(#{0 => false, 1 => true}) == [0,1].
\ No newline at end of file
diff --git a/rebar.config b/rebar.config
index 35ddaa6..b2653a2 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,6 +1,4 @@
-% uncomment to disable encoding support for erlang maps
-% {jsx_nomaps, true}.
-
 {erl_opts, [
-  {platform_define, "R14|R15", 'no_binary_to_whatever'}
+  {platform_define, "R14|R15", 'no_binary_to_whatever'},
+  {platform_define, "^((?!R1[456]).)*$", 'maps_support'}
 ]}.
\ No newline at end of file
diff --git a/rebar.config.script b/rebar.config.script
deleted file mode 100644
index c5d8d92..0000000
--- a/rebar.config.script
+++ /dev/null
@@ -1,9 +0,0 @@
-case os:getenv("JSX_NOMAPS") or proplists:get_value(jsx_nomaps, CONFIG, false) of
-  false ->
-    try file:script("config/maps") of
-      {ok, true} -> [{erl_opts, [{d, maps_support}]}] ++ CONFIG;
-      _ -> CONFIG
-    catch _:_ -> CONFIG
-    end;
-  _ -> CONFIG
-end.
\ No newline at end of file