diff --git a/.env.example b/.env.example
index 5247bef..637a2a7 100644
--- a/.env.example
+++ b/.env.example
@@ -1,7 +1,3 @@
-API_NAME='slim4-api-skeleton'
-API_VERSION='0.1.0'
-API_ENV='development'
-
 DB_HOST='127.0.0.1'
 DB_NAME='slim4_api_skeleton'
 DB_USER='root'
diff --git a/src/Helper/JsonResponse.php b/src/Helper/JsonResponse.php
index 257d972..a6cfa69 100644
--- a/src/Helper/JsonResponse.php
+++ b/src/Helper/JsonResponse.php
@@ -4,8 +4,8 @@
 
 namespace App\Helper;
 
+use Fig\Http\Message\StatusCodeInterface;
 use Psr\Http\Message\ResponseInterface as Response;
-use App\Helper\StatusCodeInterface;
 
 final class JsonResponse
 {
diff --git a/src/Helper/StatusCodeInterface.php b/src/Helper/StatusCodeInterface.php
deleted file mode 100644
index 41a91c1..0000000
--- a/src/Helper/StatusCodeInterface.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-
-namespace App\Helper;
-
-interface StatusCodeInterface
-{
-    // Informational 1xx
-    const STATUS_CONTINUE = 100;
-    const STATUS_SWITCHING_PROTOCOLS = 101;
-    const STATUS_PROCESSING = 102;
-    const STATUS_EARLY_HINTS = 103;
-    // Successful 2xx
-    const STATUS_OK = 200;
-    const STATUS_CREATED = 201;
-    const STATUS_ACCEPTED = 202;
-    const STATUS_NON_AUTHORITATIVE_INFORMATION = 203;
-    const STATUS_NO_CONTENT = 204;
-    const STATUS_RESET_CONTENT = 205;
-    const STATUS_PARTIAL_CONTENT = 206;
-    const STATUS_MULTI_STATUS = 207;
-    const STATUS_ALREADY_REPORTED = 208;
-    const STATUS_IM_USED = 226;
-    // Redirection 3xx
-    const STATUS_MULTIPLE_CHOICES = 300;
-    const STATUS_MOVED_PERMANENTLY = 301;
-    const STATUS_FOUND = 302;
-    const STATUS_SEE_OTHER = 303;
-    const STATUS_NOT_MODIFIED = 304;
-    const STATUS_USE_PROXY = 305;
-    const STATUS_RESERVED = 306;
-    const STATUS_TEMPORARY_REDIRECT = 307;
-    const STATUS_PERMANENT_REDIRECT = 308;
-    // Client Errors 4xx
-    const STATUS_BAD_REQUEST = 400;
-    const STATUS_UNAUTHORIZED = 401;
-    const STATUS_PAYMENT_REQUIRED = 402;
-    const STATUS_FORBIDDEN = 403;
-    const STATUS_NOT_FOUND = 404;
-    const STATUS_METHOD_NOT_ALLOWED = 405;
-    const STATUS_NOT_ACCEPTABLE = 406;
-    const STATUS_PROXY_AUTHENTICATION_REQUIRED = 407;
-    const STATUS_REQUEST_TIMEOUT = 408;
-    const STATUS_CONFLICT = 409;
-    const STATUS_GONE = 410;
-    const STATUS_LENGTH_REQUIRED = 411;
-    const STATUS_PRECONDITION_FAILED = 412;
-    const STATUS_PAYLOAD_TOO_LARGE = 413;
-    const STATUS_URI_TOO_LONG = 414;
-    const STATUS_UNSUPPORTED_MEDIA_TYPE = 415;
-    const STATUS_RANGE_NOT_SATISFIABLE = 416;
-    const STATUS_EXPECTATION_FAILED = 417;
-    const STATUS_IM_A_TEAPOT = 418;
-    const STATUS_MISDIRECTED_REQUEST = 421;
-    const STATUS_UNPROCESSABLE_ENTITY = 422;
-    const STATUS_LOCKED = 423;
-    const STATUS_FAILED_DEPENDENCY = 424;
-    const STATUS_TOO_EARLY = 425;
-    const STATUS_UPGRADE_REQUIRED = 426;
-    const STATUS_PRECONDITION_REQUIRED = 428;
-    const STATUS_TOO_MANY_REQUESTS = 429;
-    const STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
-    const STATUS_UNAVAILABLE_FOR_LEGAL_REASONS = 451;
-    // Server Errors 5xx
-    const STATUS_INTERNAL_SERVER_ERROR = 500;
-    const STATUS_NOT_IMPLEMENTED = 501;
-    const STATUS_BAD_GATEWAY = 502;
-    const STATUS_SERVICE_UNAVAILABLE = 503;
-    const STATUS_GATEWAY_TIMEOUT = 504;
-    const STATUS_VERSION_NOT_SUPPORTED = 505;
-    const STATUS_VARIANT_ALSO_NEGOTIATES = 506;
-    const STATUS_INSUFFICIENT_STORAGE = 507;
-    const STATUS_LOOP_DETECTED = 508;
-    const STATUS_NOT_EXTENDED = 510;
-    const STATUS_NETWORK_AUTHENTICATION_REQUIRED = 511;
-}
\ No newline at end of file
diff --git a/tests/integration/HomeTest.php b/tests/integration/HomeTest.php
index 1a04f70..5475348 100644
--- a/tests/integration/HomeTest.php
+++ b/tests/integration/HomeTest.php
@@ -4,7 +4,7 @@
 
 namespace Tests\integration;
 
-use App\Helper\StatusCodeInterface;
+use Fig\Http\Message\StatusCodeInterface;
 
 class HomeTest extends TestCase
 {