diff --git a/.github/workflows/code-style.yml b/.github/workflows/code-style.yml
index 8048ca0..d27f9b3 100644
--- a/.github/workflows/code-style.yml
+++ b/.github/workflows/code-style.yml
@@ -13,7 +13,7 @@ jobs:
     
     strategy:
       matrix:
-        php-version: ['8.4']
+        php-version: ['8.4', '8.5']
     
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 06402db..747f442 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -13,7 +13,7 @@ jobs:
     
     strategy:
       matrix:
-        php-version: ['8.4']
+        php-version: ['8.4', '8.5']
     
     steps:
     - uses: actions/checkout@v4
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 88e58e7..c2d9885 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.4']
+        php: ['8.4', '8.5']
 
     steps:
       - name: Checkout
@@ -50,6 +50,7 @@ jobs:
             --colors=always
 
       - name: Upload coverage to Codecov
+        if: matrix.php == '8.5'
         uses: codecov/codecov-action@v5
         with:
           files: build/logs/clover.xml
@@ -58,7 +59,7 @@ jobs:
           verbose: true
 
       - name: Upload test results to Codecov
-        if: ${{ !cancelled() }}
+        if: ${{ !cancelled() && matrix.php == '8.5' }}
         uses: codecov/test-results-action@v1
         with:
           files: build/logs/junit.xml
diff --git a/README.md b/README.md
index 5f38f44..ef462f5 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ composer require valbeat/result
 
 ## Requirements
 
-- PHP 8.4 or higher
+- PHP 8.4 or higher (tested on PHP 8.4 and 8.5)
 - Composer
 
 ## Basic Usage
diff --git a/phpstan.neon b/phpstan.neon
index 14d1f29..ed05d1a 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -13,5 +13,7 @@ parameters:
     checkBenevolentUnionTypes: true
     checkUninitializedProperties: true
     
-    # PHP 8.4 features
-    phpVersion: 80400
\ No newline at end of file
+    # Supported PHP versions (8.4 - 8.5)
+    phpVersion:
+        min: 80400
+        max: 80500
\ No newline at end of file