diff --git a/composer.json b/composer.json
index 050ea6b7..3d0c2387 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     "bitpay/key-utils": "^2.1",
     "guzzlehttp/guzzle": "^7.9",
     "symfony/yaml": "^5.4 || ^6.4 || ^7.0",
-    "netresearch/jsonmapper": "^5.0",
+    "netresearch/jsonmapper": "^6.0",
     "symfony/console": "^4.4 || ^5.4 || ^6.4 || ^7.3.1"
   },
   "authors": [
diff --git a/composer.lock b/composer.lock
index e2eaa6ce..6ca6cc25 100644
--- a/composer.lock
+++ b/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": "e2c25eb4b1a40f3f2f93c52e35183b4c",
+    "content-hash": "c0687d56d424b7932375a4bd58d9bd4f",
     "packages": [
         {
             "name": "bitpay/key-utils",
@@ -390,16 +390,16 @@
         },
         {
             "name": "netresearch/jsonmapper",
-            "version": "v5.0.1",
+            "version": "v6.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/cweiske/jsonmapper.git",
-                "reference": "980674efdda65913492d29a8fd51c82270dd37bb"
+                "reference": "31226dd465e3e38f5a8f66ef1393cd8daad248dd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/980674efdda65913492d29a8fd51c82270dd37bb",
-                "reference": "980674efdda65913492d29a8fd51c82270dd37bb",
+                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/31226dd465e3e38f5a8f66ef1393cd8daad248dd",
+                "reference": "31226dd465e3e38f5a8f66ef1393cd8daad248dd",
                 "shasum": ""
             },
             "require": {
@@ -407,11 +407,13 @@
                 "ext-pcre": "*",
                 "ext-reflection": "*",
                 "ext-spl": "*",
-                "php": ">=7.1"
+                "php": ">=8.1"
             },
             "require-dev": {
+                "phpstan/phpstan": "^2.2",
                 "phpunit/phpunit": "~7.5 || ~8.0 || ~9.0 || ~10.0",
-                "squizlabs/php_codesniffer": "~3.5"
+                "psr/log": "^3.0",
+                "squizlabs/php_codesniffer": "^4.0"
             },
             "type": "library",
             "autoload": {
@@ -435,9 +437,9 @@
             "support": {
                 "email": "cweiske@cweiske.de",
                 "issues": "https://github.com/cweiske/jsonmapper/issues",
-                "source": "https://github.com/cweiske/jsonmapper/tree/v5.0.1"
+                "source": "https://github.com/cweiske/jsonmapper/tree/v6.0.0"
             },
-            "time": "2026-02-22T16:28:03+00:00"
+            "time": "2026-06-29T16:03:16+00:00"
         },
         {
             "name": "psr/container",