diff --git a/.github/workflows/bc.yml b/.github/workflows/bc.yml
index 8dbb1f8..f07bcef 100644
--- a/.github/workflows/bc.yml
+++ b/.github/workflows/bc.yml
@@ -24,4 +24,4 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.4']
+        ['8.5']
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fdc9d1f..8b2a935 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -28,4 +28,4 @@ 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-dependency-analyser.yml b/.github/workflows/composer-dependency-analyser.yml
index 6b72a92..c68f40c 100644
--- a/.github/workflows/composer-dependency-analyser.yml
+++ b/.github/workflows/composer-dependency-analyser.yml
@@ -24,4 +24,4 @@ jobs:
     uses: yiisoft/actions/.github/workflows/composer-dependency-analyser.yml@master
     with:
       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/static.yml b/.github/workflows/static.yml
index 455029f..edab6ed 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -43,4 +43,4 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.3', '8.4']
+        ['8.3', '8.4', '8.5']
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8aedca..e82daec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## 1.0.4 under development
 
-- no changes in this release.
+- Enh #61: Add PHP 8.5 support (@vjik)
 
 ## 1.0.3 August 31, 2026
 
diff --git a/README.md b/README.md
index 307b251..1d3e013 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,8 @@ For more information on how to use middleware in the [Yii Framework](https://www
 
 ## Requirements
 
-- PHP 8.0 or higher.
+- PHP 8.0 - 8.5.
+- `filter` PHP extension.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index f3afe7b..0fc8872 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     ],
     "prefer-stable": true,
     "require": {
-        "php": "8.0 - 8.4",
+        "php": "8.0 - 8.5",
         "ext-filter": "*",
         "psr/http-message": "^1.0 || ^2.0",
         "psr/http-server-handler": "^1.0",