diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6c2bb17..7cca40b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -26,6 +26,6 @@ jobs:
       os: >-
         ['ubuntu-latest', 'windows-latest']
       php: >-
-        ['8.1', '8.2', '8.3', '8.4', '8.5']
+        ['8.1', '8.2', '8.3', '8.4', '8.5', '8.6']
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.github/workflows/composer-dependency-analyser.yml b/.github/workflows/composer-dependency-analyser.yml
index 3fed6a3..98822bf 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: >-
-        ['8.1', '8.2', '8.3', '8.4', '8.5']
+        ['8.1', '8.2', '8.3', '8.4', '8.5', '8.6']
diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index 31e4dfb..18fed5b 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -27,7 +27,7 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.5']
+        ['8.6']
       infection-args: "--ignore-msi-with-no-mutations"
     secrets:
       STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 2ad8e48..ad57f4b 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -25,4 +25,4 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.1', '8.2', '8.3', '8.4', '8.5']
+        ['8.1', '8.2', '8.3', '8.4', '8.5', '8.6']
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3df4361..41b43d2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 - Enh #167: Remove dead code in `StringHelper::truncateWordsByLength()` (@vjik)
 - Enh #172: Optimize `StringHelper::startsWithIgnoringCase()` and `StringHelper::endsWithIgnoringCase()` (@vjik)
 - Enh #174: Exclude all development files from distribution archive (@vjik)
+- Enh #175: Add PHP 8.6 support (@vjik)
 
 ## 2.7.0 November 23, 2025
 
diff --git a/README.md b/README.md
index 90ae7ee..e3eb995 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The package provides:
 
 ## Requirements
 
-- PHP 8.1 - 8.5.
+- PHP 8.1 - 8.6.
 - `mbstring` PHP extension.
 
 ## Installation
diff --git a/composer.json b/composer.json
index feff1b3..b8bf40f 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         }
     ],
     "require": {
-        "php": "8.1 - 8.5",
+        "php": "8.1 - 8.6",
         "ext-mbstring": "*"
     },
     "require-dev": {