diff --git a/lib_oauthserver/composer.json b/lib_oauthserver/composer.json
index 465ef23..5ca0a3d 100644
--- a/lib_oauthserver/composer.json
+++ b/lib_oauthserver/composer.json
@@ -17,6 +17,7 @@
   "require": {
     "php": "^8.0",
     "league/oauth2-server": "^8.5",
-    "ext-openssl": "*"
+    "ext-openssl": "*",
+    "lcobucci/jwt": "^4.3"
   }
 }
diff --git a/lib_oauthserver/composer.lock b/lib_oauthserver/composer.lock
index 007370b..c9527e3 100644
--- a/lib_oauthserver/composer.lock
+++ b/lib_oauthserver/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "99504adfe2d28f30254fe17d8bd1fede",
+    "content-hash": "f7d739043e749d41c66823516915439a",
     "packages": [
         {
             "name": "defuse/php-encryption",
@@ -139,38 +139,39 @@
         },
         {
             "name": "lcobucci/jwt",
-            "version": "5.2.0",
+            "version": "4.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/lcobucci/jwt.git",
-                "reference": "0ba88aed12c04bd2ed9924f500673f32b67a6211"
+                "reference": "4d7de2fe0d51a96418c0d04004986e410e87f6b4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/lcobucci/jwt/zipball/0ba88aed12c04bd2ed9924f500673f32b67a6211",
-                "reference": "0ba88aed12c04bd2ed9924f500673f32b67a6211",
+                "url": "https://api.github.com/repos/lcobucci/jwt/zipball/4d7de2fe0d51a96418c0d04004986e410e87f6b4",
+                "reference": "4d7de2fe0d51a96418c0d04004986e410e87f6b4",
                 "shasum": ""
             },
             "require": {
+                "ext-hash": "*",
+                "ext-json": "*",
+                "ext-mbstring": "*",
                 "ext-openssl": "*",
                 "ext-sodium": "*",
-                "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
-                "psr/clock": "^1.0"
+                "lcobucci/clock": "^2.0 || ^3.0",
+                "php": "^7.4 || ^8.0"
             },
             "require-dev": {
-                "infection/infection": "^0.27.0",
-                "lcobucci/clock": "^3.0",
-                "lcobucci/coding-standard": "^11.0",
-                "phpbench/phpbench": "^1.2.9",
-                "phpstan/extension-installer": "^1.2",
-                "phpstan/phpstan": "^1.10.7",
-                "phpstan/phpstan-deprecation-rules": "^1.1.3",
-                "phpstan/phpstan-phpunit": "^1.3.10",
-                "phpstan/phpstan-strict-rules": "^1.5.0",
-                "phpunit/phpunit": "^10.2.6"
-            },
-            "suggest": {
-                "lcobucci/clock": ">= 3.0"
+                "infection/infection": "^0.21",
+                "lcobucci/coding-standard": "^6.0",
+                "mikey179/vfsstream": "^1.6.7",
+                "phpbench/phpbench": "^1.2",
+                "phpstan/extension-installer": "^1.0",
+                "phpstan/phpstan": "^1.4",
+                "phpstan/phpstan-deprecation-rules": "^1.0",
+                "phpstan/phpstan-phpunit": "^1.0",
+                "phpstan/phpstan-strict-rules": "^1.0",
+                "phpunit/php-invoker": "^3.1",
+                "phpunit/phpunit": "^9.5"
             },
             "type": "library",
             "autoload": {
@@ -196,7 +197,7 @@
             ],
             "support": {
                 "issues": "https://github.com/lcobucci/jwt/issues",
-                "source": "https://github.com/lcobucci/jwt/tree/5.2.0"
+                "source": "https://github.com/lcobucci/jwt/tree/4.3.0"
             },
             "funding": [
                 {
@@ -208,7 +209,7 @@
                     "type": "patreon"
                 }
             ],
-            "time": "2023-11-20T21:17:42+00:00"
+            "time": "2023-01-02T13:28:00+00:00"
         },
         {
             "name": "league/event",
@@ -739,7 +740,10 @@
     "stability-flags": [],
     "prefer-stable": false,
     "prefer-lowest": false,
-    "platform": [],
+    "platform": {
+        "php": "^8.0",
+        "ext-openssl": "*"
+    },
     "platform-dev": [],
     "plugin-api-version": "2.6.0"
 }