diff --git a/.gitignore b/.gitignore
index 1de72e5..2631cf7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,3 +14,5 @@ rel/example_project
 .erlang.mk
 log
 logs
+doc
+_build
\ No newline at end of file
diff --git a/rebar.config b/rebar.config
index d8e3b94..12a8fa5 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,14 +1,100 @@
-{deps,
- [
-  {jiffy, "0.14.7"},
-  {trails, ".*", {git, "https://github.com/inaka/cowboy-trails.git", {ref, "bc92848"}}}
- ]
-}.
-{xref_warnings, true}.
-{xref_checks,
-  [ undefined_function_calls
-  , locals_not_used
-  , deprecated_function_calls
-  , deprecated_functions
-  ]
-}.
+%% -*- mode: erlang;erlang-indent-level: 2;indent-tabs-mode: nil -*-
+%% ex: ts=4 sw=4 ft=erlang et
+
+%% == Erlang Compiler ==
+
+%% Erlang compiler options
+{erl_opts, [ warn_unused_vars
+           , warn_export_all
+           , warn_shadow_vars
+           , warn_unused_import
+           , warn_unused_function
+           , warn_bif_clash
+           , warn_unused_record
+           , warn_deprecated_function
+           , warn_obsolete_guard
+           , strict_validation
+           , warn_export_vars
+           , warn_exported_vars
+           , warn_missing_spec
+           , warn_untyped_record
+           , debug_info]}.
+
+{profiles, [
+  {test, [
+    {deps, [ {katana_test, "0.1.1"}
+           , {mixer,       {git, "https://github.com/inaka/mixer.git", {tag, "0.1.5"}}}
+           , {shotgun,     "0.2.3"}
+    ]}
+  ]},
+  {shell, [
+    {deps, [
+      {sync, {git, "https://github.com/rustyio/sync.git", {ref, "9c78e7b"}}}
+    ]}
+  ]}
+]}.
+
+%% == Common Test ==
+
+{ct_compile_opts, [ warn_unused_vars
+                  , warn_export_all
+                  , warn_shadow_vars
+                  , warn_unused_import
+                  , warn_unused_function
+                  , warn_bif_clash
+                  , warn_unused_record
+                  , warn_deprecated_function
+                  , warn_obsolete_guard
+                  , strict_validation
+                  , warn_export_vars
+                  , warn_exported_vars
+                  , warn_missing_spec
+                  , warn_untyped_record
+                  , debug_info]}.
+
+{ct_opts, [ {sys_config, ["./test/test.config"]}
+          , {verbose, true}]}.
+
+%% == Cover ==
+
+{cover_enabled, true}.
+
+{cover_opts, [verbose]}.
+
+%% == Dependencies ==
+
+{deps, [ {jiffy, "0.14.7"}
+       , {trails, "0.2.0"}
+       ]}.
+
+%% == Dialyzer ==
+
+{dialyzer, [ {warnings, [ no_return
+                        , unmatched_returns
+                        , error_handling
+                        ]}
+           , {plt_apps, top_level_deps}
+           , {plt_extra_apps, []}
+           , {plt_location, local}
+           , {base_plt_apps, [stdlib, kernel]}
+           , {base_plt_location, global}]}.
+
+{overrides,
+ [{override, jiffy, [
+     {plugins, [pc]},
+     {artifacts, ["priv/jiffy.so"]},
+     {provider_hooks, [
+         {post,
+             [
+             {compile, {pc, compile}},
+             {clean, {pc, clean}}
+             ]
+          }]
+      }
+  ]}
+]}.
+
+
+%% == Shell ==
+
+{shell, [{apps, [sync]}]}.
\ No newline at end of file
diff --git a/rebar.lock b/rebar.lock
new file mode 100644
index 0000000..e8cb883
--- /dev/null
+++ b/rebar.lock
@@ -0,0 +1,5 @@
+[{<<"cowboy">>,{pkg,<<"cowboy">>,<<"1.0.4">>},1},
+ {<<"cowlib">>,{pkg,<<"cowlib">>,<<"1.0.2">>},2},
+ {<<"jiffy">>,{pkg,<<"jiffy">>,<<"0.14.7">>},0},
+ {<<"ranch">>,{pkg,<<"ranch">>,<<"1.2.1">>},1},
+ {<<"trails">>,{pkg,<<"trails">>,<<"0.2.0">>},0}].
diff --git a/src/cowboy_swagger.app.src b/src/cowboy_swagger.app.src
index 2f89144..3befeb8 100644
--- a/src/cowboy_swagger.app.src
+++ b/src/cowboy_swagger.app.src
@@ -17,6 +17,6 @@
            {"Blog", "http://inaka.net/blog/2015/08/19/cowboy-swagger/"},
            {"Example", "https://github.com/inaka/cowboy-swagger/tree/master/example"}
          ]},
-  {build_tools,["erlang.mk", "rebar"]}
+  {build_tools,["rebar3"]}
  ]
 }.
diff --git a/src/cowboy_swagger_json_handler.erl b/src/cowboy_swagger_json_handler.erl
index 7fbff10..fb4fd3f 100644
--- a/src/cowboy_swagger_json_handler.erl
+++ b/src/cowboy_swagger_json_handler.erl
@@ -43,6 +43,8 @@ content_types_provided(Req, State) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %% @hidden
+-spec handle_get(cowboy_req:req(), state()) ->
+  {iodata(), cowboy_req:req(), state()}.
 handle_get(Req, State) ->
   Server = maps:get(server, State, '_'),
   HostMatch = maps:get(host, State, '_'),
diff --git a/test/cowboy_swagger_handler_SUITE.erl b/test/cowboy_swagger_handler_SUITE.erl
index 54fbd57..ae57627 100644
--- a/test/cowboy_swagger_handler_SUITE.erl
+++ b/test/cowboy_swagger_handler_SUITE.erl
@@ -97,7 +97,8 @@ handler_test(_Config) ->
   ct:comment("GET /api-docs/swagger-ui-js should return 200 OK"),
   #{status_code := 200, body := SwaggerUIBody} =
     cowboy_swagger_test_utils:api_call(get, "/api-docs/swagger-ui.js"),
-  {ok, SwaggerUIBodySrc} = file:read_file("../../priv/swagger/swagger-ui.js"),
+  {ok, SwaggerUIBodySrc} =
+    file:read_file("../../../../priv/swagger/swagger-ui.js"),
   SwaggerUIBody = SwaggerUIBodySrc,
 
   %% GET unknown-file.ext - test /api-docs/[...] trail
diff --git a/test/cowboy_swagger_meta_SUITE.erl b/test/cowboy_swagger_meta_SUITE.erl
index 9ec60e9..21ea2f6 100644
--- a/test/cowboy_swagger_meta_SUITE.erl
+++ b/test/cowboy_swagger_meta_SUITE.erl
@@ -15,4 +15,4 @@
 
 -spec init_per_suite(config()) -> config().
 init_per_suite(Config) ->
-    [ {base_dir, "../.."} | Config].
+    [ {application, cowboy_swagger} | Config].