diff --git a/frontend/composer.json b/frontend/composer.json
index adff7ea80..23086c420 100644
--- a/frontend/composer.json
+++ b/frontend/composer.json
@@ -16,7 +16,7 @@
         "yiisoft/yii2-bootstrap": "~2.0.11",
         "yiisoft/yii2-bootstrap4": "^2.0.11",
         "overals/yii2-whois": "~1.0.2",
-        "stripe/stripe-php": "^20.0",
+        "stripe/stripe-php": "^21.0",
         "yiisoft/yii2-symfonymailer": "^4.0.0",
         "echoctf/identicon": "^2.0",
         "cebe/markdown": "^1.2",
diff --git a/frontend/composer.lock b/frontend/composer.lock
index 10e6c4481..3ebe4ab7a 100644
--- a/frontend/composer.lock
+++ b/frontend/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": "06a9c1938461fa80ad539bdb43ceefd7",
+    "content-hash": "0c7962b6cad26abebcfddf1d35bb25ef",
     "packages": [
         {
             "name": "bower-asset/bootstrap",
@@ -649,16 +649,16 @@
         },
         {
             "name": "stripe/stripe-php",
-            "version": "v20.3.0",
+            "version": "v21.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/stripe/stripe-php.git",
-                "reference": "266f0b05890172184cca66a0688abaf1a96b08d8"
+                "reference": "0498d20d0c33490c38df956dd7cef49b3a2ad6f0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/stripe/stripe-php/zipball/266f0b05890172184cca66a0688abaf1a96b08d8",
-                "reference": "266f0b05890172184cca66a0688abaf1a96b08d8",
+                "url": "https://api.github.com/repos/stripe/stripe-php/zipball/0498d20d0c33490c38df956dd7cef49b3a2ad6f0",
+                "reference": "0498d20d0c33490c38df956dd7cef49b3a2ad6f0",
                 "shasum": ""
             },
             "require": {
@@ -705,9 +705,9 @@
             ],
             "support": {
                 "issues": "https://github.com/stripe/stripe-php/issues",
-                "source": "https://github.com/stripe/stripe-php/tree/v20.3.0"
+                "source": "https://github.com/stripe/stripe-php/tree/v21.0.0"
             },
-            "time": "2026-06-24T22:45:28+00:00"
+            "time": "2026-07-16T00:34:23+00:00"
         },
         {
             "name": "symfony/deprecation-contracts",