diff --git a/composer.json b/composer.json
index f5e8f6e..dec431a 100644
--- a/composer.json
+++ b/composer.json
@@ -36,6 +36,6 @@
         "ext-curl": "*",
         "phpmailer/phpmailer": "7.0.2",
         "grpc/grpc": "1.74.0",
-        "google/protobuf": "4.33.5"
+        "google/protobuf": "5.34.0"
     }
 }
diff --git a/composer.lock b/composer.lock
index 6d7ba7b..cb95cbb 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,27 +4,27 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "dc873212d4497e1bab848d8f3ece5310",
+    "content-hash": "ca8ce49dfa3bd7a7d1eac83ab4ebfdb4",
     "packages": [
         {
             "name": "google/protobuf",
-            "version": "v4.33.5",
+            "version": "v5.34.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/protocolbuffers/protobuf-php.git",
-                "reference": "ebe8010a61b2ae0cff0d246fe1c4d44e9f7dfa6d"
+                "reference": "1debe453db83159b98a38df5a3737feb1e8ef016"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/ebe8010a61b2ae0cff0d246fe1c4d44e9f7dfa6d",
-                "reference": "ebe8010a61b2ae0cff0d246fe1c4d44e9f7dfa6d",
+                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/1debe453db83159b98a38df5a3737feb1e8ef016",
+                "reference": "1debe453db83159b98a38df5a3737feb1e8ef016",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.1.0"
+                "php": ">=8.2.0"
             },
             "require-dev": {
-                "phpunit/phpunit": ">=5.0.0 <8.5.27"
+                "phpunit/phpunit": ">=11.5.0 <12.0.0"
             },
             "suggest": {
                 "ext-bcmath": "Need to support JSON deserialization"
@@ -46,9 +46,9 @@
                 "proto"
             ],
             "support": {
-                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v4.33.5"
+                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v5.34.0"
             },
-            "time": "2026-01-29T20:49:00+00:00"
+            "time": "2026-02-25T21:19:40+00:00"
         },
         {
             "name": "grpc/grpc",