diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0fdc8a..d4ba6ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 1.5.3 - UPCOMING
+
+* Require `guzzlehttp/guzzle` ^7.15 and `guzzlehttp/psr7` ^2.13
+
 ## 1.5.2 - 2026-07-08
 
 * Require `guzzlehttp/guzzle` ^7.13.3, `guzzlehttp/promises` ^2.5.1, and `guzzlehttp/psr7` ^2.12.4
diff --git a/composer.json b/composer.json
index 1ee813b..1963c70 100644
--- a/composer.json
+++ b/composer.json
@@ -26,9 +26,9 @@
     ],
     "require": {
         "php": "^7.2.5 || ^8.0",
-        "guzzlehttp/guzzle": "^7.13.3",
+        "guzzlehttp/guzzle": "^7.15",
         "guzzlehttp/promises": "^2.5.1",
-        "guzzlehttp/psr7": "^2.12.4",
+        "guzzlehttp/psr7": "^2.13",
         "symfony/deprecation-contracts": "^2.5 || ^3.0"
     },
     "require-dev": {