diff --git a/app/Config/Constants.php b/app/Config/Constants.php
index fdc842e..b378f24 100644
--- a/app/Config/Constants.php
+++ b/app/Config/Constants.php
@@ -147,15 +147,15 @@ define('SESSION_USER_FIELDS', [
 //인증 관련
 define('AUTH_ADAPTERS', [
   'Local' => [
-    'DEBUG' => getenv("auth.loca.debug") ?: false,
+    'DEBUG' => getenv("auth.loca.debug") ?? false,
   ],
   'Google' => [
-    'DEBUG' => getenv("auth.google.debug") ?: false,
-    'ICON' => getenv("auth.google.icon") ?: '<img src="/images/auth/google_login_button.png"/>',
+    'DEBUG' => getenv("auth.google.debug") ?? false,
+    'ICON' => getenv("auth.google.icon") ?? '<img src="/images/auth/google_login_button.png"/>',
     'CLIENT_ID' => getenv("auth.google.client.id"),
     'CLIENT_KEY' => getenv("auth.google.client.key"),
     'CALLBACK_URL' => getenv("auth.google.client.callback_url"),
-    'TOKEN_NAME' => getenv('auth.google.client.token_name') ?: "access_token",
+    'TOKEN_NAME' => getenv('auth.google.client.token_name') ?? "access_token",
   ],
 ]);
 //등급 관련
@@ -168,10 +168,10 @@ define('STATUS', ["use" => "사용", "unuse" => "사용않함",]);
 
 //Upload , Download 관련
 define('PATHS', [
-  'EXCEL' => getenv('path.excel') ?: "../writable/Excel",
-  'UPLOAD' => getenv('path.upload') ?: "../writable/uploads",
-  'DOWNLOAD' => getenv('path.download') ?: "../writable/download",
-  'API' => getenv('path.api') ?: "../writable/api",
+  'EXCEL' => getenv('path.excel') ?? "../writable/Excel",
+  'UPLOAD' => getenv('path.upload') ?? "../writable/uploads",
+  'DOWNLOAD' => getenv('path.download') ?? "../writable/download",
+  'API' => getenv('path.api') ?? "../writable/api",
 ]);
 foreach (PATHS as $key => $path) {
   if (!is_dir(APPPATH . $path)) {
@@ -194,14 +194,14 @@ define('AUDIOS', [
 
 //Default값 정의
 define('DEFAULTS', [
-  'ROLE' => getenv('default.role') ?: "user",
-  'STATUS' => getenv('default.status') ?: "use",
-  'EMPTY' => getenv('default.empty') ?: "",
-  'PERPAGE' => getenv('default.perpage') ?: 20,
+  'ROLE' => getenv('default.role') ?? "user",
+  'STATUS' => getenv('default.status') ?? "use",
+  'EMPTY' => getenv('default.empty') ?? "",
+  'PERPAGE' => getenv('default.perpage') ?? 20,
 ]);
 
 //UUID초기값 정의
 define('UUIDS', [
-  'NAMESPACE' => getenv('uuid.namespace') ?: "8fc990b07418d5826d98de952cfb268dee4a23a3",
-  'SECRET' => getenv('uuid.secret') ?: "delftstack1",
+  'NAMESPACE' => getenv('uuid.namespace') ?? "8fc990b07418d5826d98de952cfb268dee4a23a3",
+  'SECRET' => getenv('uuid.secret') ?? "delftstack1",
 ]);