diff --git a/composer.lock b/composer.lock
index bcf4c49..13ea6ab 100644
--- a/composer.lock
+++ b/composer.lock
@@ -8,23 +8,23 @@
     "packages": [
         {
             "name": "google/protobuf",
-            "version": "v3.23.4",
+            "version": "v4.33.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/protocolbuffers/protobuf-php.git",
-                "reference": "fa784054760eec532fe8dd1919d3a0a11f5cef1f"
+                "reference": "84b008c23915ed94536737eae46f41ba3bccfe67"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/fa784054760eec532fe8dd1919d3a0a11f5cef1f",
-                "reference": "fa784054760eec532fe8dd1919d3a0a11f5cef1f",
+                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/84b008c23915ed94536737eae46f41ba3bccfe67",
+                "reference": "84b008c23915ed94536737eae46f41ba3bccfe67",
                 "shasum": ""
             },
             "require": {
-                "php": ">=7.0.0"
+                "php": ">=8.1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": ">=5.0.0"
+                "phpunit/phpunit": ">=10.5.62 <11.0.0"
             },
             "suggest": {
                 "ext-bcmath": "Need to support JSON deserialization"
@@ -46,9 +46,9 @@
                 "proto"
             ],
             "support": {
-                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v3.23.4"
+                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v4.33.6"
             },
-            "time": "2023-07-06T18:51:48+00:00"
+            "time": "2026-03-18T17:32:05+00:00"
         },
         {
             "name": "psr/log",
@@ -4260,12 +4260,12 @@
     ],
     "aliases": [],
     "minimum-stability": "stable",
-    "stability-flags": [],
+    "stability-flags": {},
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
         "ext-bcmath": "*"
     },
-    "platform-dev": [],
-    "plugin-api-version": "2.3.0"
+    "platform-dev": {},
+    "plugin-api-version": "2.9.0"
 }