diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d65013..0fad999 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,16 +3,28 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning] (http://semver.org/).
 For change log format, use [Keep a Changelog] (http://keepachangelog.com/).
 
+## [1.3.0] - 2024-12-12
+
+### Added
+
+- "file" action to include content of file in config
+
 ## [1.2.0] - 2020-11-05
+
 ### Added
+
 - PHP 8 compatibility
 
 ## [1.1.1] - 2020-09-23
+
 ### Changed
+
 - Fix variable replacement by null with empty string
 
 ## [1.1.0] - 2020-04-17
+
 ### Added
+
 - New `const` action to get constant value
 
 ## [1.0.0] - 2020-02-17
diff --git a/README.md b/README.md
index a4dd574..88ca996 100644
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@
 
 [![Latest Version](https://img.shields.io/packagist/v/berlioz/config.svg?style=flat-square)](https://github.com/BerliozFramework/Config/releases)
 [![Software license](https://img.shields.io/github/license/BerliozFramework/Config.svg?style=flat-square)](https://github.com/BerliozFramework/Config/blob/1.x/LICENSE)
-[![Build Status](https://img.shields.io/github/workflow/status/BerliozFramework/Config/Tests/1.x.svg?style=flat-square)](https://github.com/BerliozFramework/Config/actions/workflows/tests.yml?query=branch%3A1.x)
-[![Quality Grade](https://img.shields.io/codacy/grade/f290647a1f5143ec8299ecea9b83d6b1/1.x.svg?style=flat-square)](https://www.codacy.com/manual/BerliozFramework/Config)
+[![Build Status](https://img.shields.io/github/actions/workflow/status/BerliozFramework/Config/tests.yml?branch=1.x&style=flat-square)](https://github.com/BerliozFramework/Config/actions/workflows/tests.yml?query=branch%3A1.x)
+[![Quality Grade](https://img.shields.io/codacy/grade/f290647a1f5143ec8299ecea9b83d6b1/1.x.svg?style=flat-square)](https://www.codacy.com/gh/BerliozFramework/Config)
 [![Total Downloads](https://img.shields.io/packagist/dt/berlioz/config.svg?style=flat-square)](https://packagist.org/packages/berlioz/config)
 
 **Berlioz Configuration** is a PHP library to manage your configuration files.
@@ -108,6 +108,7 @@ Just to do actions like include or extends JSON files.
 * Extends a file: `%extends:filename.json, filename2.json, filename3.json%`
 * Replace by an env variable: `%env:VAR_NAME%`
 * Replace by a constant: `%const:VAR_NAME%` or `%constant:VAR_NAME%` 
+* Replace by a file contents: `%file:/my/file.txt%` 
 * Allow inline comments : `// My comment` (comment must be alone on a line) 
 
 You can define your own actions with static method `ExtendedJsonConfig::addAction(string $name, callable $callback)`.
diff --git a/src/ExtendedJsonConfig.php b/src/ExtendedJsonConfig.php
index 726071d..60c13fe 100644
--- a/src/ExtendedJsonConfig.php
+++ b/src/ExtendedJsonConfig.php
@@ -15,6 +15,7 @@
 namespace Berlioz\Config;
 
 use Berlioz\Config\Exception\ConfigException;
+use Berlioz\Config\Exception\NotFoundException;
 use Exception;
 
 /**
@@ -117,7 +118,10 @@ public function doActions(&$value, $key, string $baseDirectory)
 
         $matches = [];
         if (preg_match(
-                sprintf('/^\s*%1$s(?<action>[\w\-.]+)\:(?<var>[\w\-_.:,\\\\\s]+)%1$s\s*$/i', preg_quote(self::TAG)),
+                sprintf(
+                    '/^\s*%1$s(?<action>[\w\-.]+)\:(?<var>[\w\-_.:,\/\\\\\s]+)%1$s\s*$/i',
+                    preg_quote(self::TAG)
+                ),
                 $value,
                 $matches
             ) != 1) {
@@ -144,6 +148,15 @@ function ($file) use ($baseDirectory) {
                 case 'env':
                     $value = getenv($matches['var']);
                     break;
+                case 'file':
+                    $currentDir = getcwd();
+                    chdir($baseDirectory);
+                    $value = @file_get_contents($matches['var']);
+                    if (false === $value) {
+                        throw new NotFoundException(sprintf('Included file "%s" not found', $matches['var']));
+                    }
+                    chdir($currentDir);
+                    break;
                 case 'const':
                 case 'constant':
                     $value = constant($matches['var']);
diff --git a/tests/ExtendedJsonConfigTest.php b/tests/ExtendedJsonConfigTest.php
index bc3fc12..0805c12 100644
--- a/tests/ExtendedJsonConfigTest.php
+++ b/tests/ExtendedJsonConfigTest.php
@@ -124,6 +124,8 @@ function ($value) {
             }
         );
         $config = new ExtendedJsonConfig(sprintf('%s%s', __DIR__, '/files/config.extended2.json'), true);
+
         $this->assertEquals(10, $config->get('action'));
+        $this->assertEquals('BAR', $config->get('file'));
     }
 }
diff --git a/tests/files/config.extended2.json b/tests/files/config.extended2.json
index dc6bb83..8be7628 100644
--- a/tests/files/config.extended2.json
+++ b/tests/files/config.extended2.json
@@ -2,5 +2,6 @@
   "@extends": "config.json",
   "debug": true,
   "log": "alert",
-  "action": "%actionTest:5%"
+  "action": "%actionTest:5%",
+  "file": "%file:./file_contents.txt%"
 }
\ No newline at end of file
diff --git a/tests/files/file_contents.txt b/tests/files/file_contents.txt
new file mode 100644
index 0000000..add8373
--- /dev/null
+++ b/tests/files/file_contents.txt
@@ -0,0 +1 @@
+BAR
\ No newline at end of file