diff --git a/composer.lock b/composer.lock
index a424e9463..c5fc0c61d 100644
--- a/composer.lock
+++ b/composer.lock
@@ -824,23 +824,23 @@
         },
         {
             "name": "google/protobuf",
-            "version": "v5.35.1",
+            "version": "v5.36.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/protocolbuffers/protobuf-php.git",
-                "reference": "55bb4a7d6739b5af0927b96213c1371a3afb7cfb"
+                "reference": "9c105104b54709ecd902494ab340ed2122789b2d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/55bb4a7d6739b5af0927b96213c1371a3afb7cfb",
-                "reference": "55bb4a7d6739b5af0927b96213c1371a3afb7cfb",
+                "url": "https://api.github.com/repos/protocolbuffers/protobuf-php/zipball/9c105104b54709ecd902494ab340ed2122789b2d",
+                "reference": "9c105104b54709ecd902494ab340ed2122789b2d",
                 "shasum": ""
             },
             "require": {
                 "php": ">=8.2.0"
             },
             "require-dev": {
-                "phpunit/phpunit": ">=11.5.0 <12.0.0"
+                "phpunit/phpunit": ">=11.5.50 <12.0.0"
             },
             "suggest": {
                 "ext-bcmath": "Need to support JSON deserialization"
@@ -862,9 +862,9 @@
                 "proto"
             ],
             "support": {
-                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v5.35.1"
+                "source": "https://github.com/protocolbuffers/protobuf-php/tree/v5.36.0"
             },
-            "time": "2026-06-11T21:19:23+00:00"
+            "time": "2026-08-20T13:06:50+00:00"
         },
         {
             "name": "guzzlehttp/guzzle",