diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 68fac01..3c26d62 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,4 +31,4 @@ jobs:
       os: >-
         ['ubuntu-latest', 'windows-latest']
       php: >-
-        ['8.0', '8.1', '8.2', '8.3', '8.4']
+        ['8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
diff --git a/.github/workflows/composer-require-checker.yml b/.github/workflows/composer-require-checker.yml
index 632bfd4..a035b54 100644
--- a/.github/workflows/composer-require-checker.yml
+++ b/.github/workflows/composer-require-checker.yml
@@ -31,4 +31,4 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.0', '8.1', '8.2', '8.3', '8.4']
+        ['8.0', '8.1', '8.2', '8.3', '8.4', '8.5']
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 61db628..1114ca7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 3.2.1 under development
 
-- no changes in this release.
+- Enh #103: Add PHP 8.5 support (@vjik)
 
 ## 3.2.0 September 11, 2025
 
diff --git a/README.md b/README.md
index ad2efc9..571fc01 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ a [PSR-15](https://www.php-fig.org/psr/psr-15/) middleware to authenticate an id
 
 ## Requirements
 
-- PHP 8.0 or higher.
+- PHP 8.0 - 8.5.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index 67b090b..b7b5745 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         }
     ],
     "require": {
-        "php": "8.0 - 8.4",
+        "php": "8.0 - 8.5",
         "psr/http-factory": "^1.0",
         "psr/http-message": "^1.0 || ^2.0",
         "psr/http-server-handler": "^1.0",