diff --git a/php/composer.lock b/php/composer.lock
index 019aa847..106bde48 100644
--- a/php/composer.lock
+++ b/php/composer.lock
@@ -276,16 +276,16 @@
         },
         {
             "name": "guzzlehttp/psr7",
-            "version": "2.12.0",
+            "version": "2.12.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/psr7.git",
-                "reference": "9b38012e7b54f594707e6db52c684dc0a74b3a43"
+                "reference": "172ef2f4e9824c1e058b7f30be8ae25a02c0f2b7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/psr7/zipball/9b38012e7b54f594707e6db52c684dc0a74b3a43",
-                "reference": "9b38012e7b54f594707e6db52c684dc0a74b3a43",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/172ef2f4e9824c1e058b7f30be8ae25a02c0f2b7",
+                "reference": "172ef2f4e9824c1e058b7f30be8ae25a02c0f2b7",
                 "shasum": ""
             },
             "require": {
@@ -375,7 +375,7 @@
             ],
             "support": {
                 "issues": "https://github.com/guzzle/psr7/issues",
-                "source": "https://github.com/guzzle/psr7/tree/2.12.0"
+                "source": "https://github.com/guzzle/psr7/tree/2.12.1"
             },
             "funding": [
                 {
@@ -391,7 +391,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-06-16T21:50:11+00:00"
+            "time": "2026-06-18T09:49:37+00:00"
         },
         {
             "name": "http-interop/http-factory-guzzle",