diff --git a/.phan/config.php b/.phan/config.php
index 7a1db68..87138de 100644
--- a/.phan/config.php
+++ b/.phan/config.php
@@ -77,6 +77,8 @@ return [
 	// A list of directories holding code that we want
 	// to parse, but not analyze
 	"exclude_analysis_directory_list" => [
+		'vendor',
+		'test'
 	],
 	'exclude_file_list' => [
 	],
diff --git a/Readme.md b/Readme.md
index 4adecc0..1c80ca8 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,12 +1,16 @@
 # dotenv: readEnvFile()
 
-A single function implementation of <https://github.com/vlucas/phpdotenv>
+A simple implementation of <https://github.com/vlucas/phpdotenv>
 
 This is not a functional replacement, but a very simple implementation of the basic functions.
 
 It is recommended to create a `.env.example` example file that is checked into the
 repository. The `.env` should *NEVER* be checked into anything
 
+## How to install
+
+`comoser require gullevek/dotEnv`
+
 ## How it works
 
 Put the function where it is needed or put it in a file and load it.
diff --git a/phpstan.neon b/phpstan.neon
index cebe292..3802893 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -5,3 +5,6 @@ parameters:
 	level: max
 	paths:
 		- %currentWorkingDirectory%
+	excludePaths:
+		- vendor
+		- test
diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 0000000..2b10313
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<psalm
+    errorLevel="3"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+            <directory name="test" />
+        </ignoreFiles>
+    </projectFiles>
+</psalm>
diff --git a/test/phpUnitTests/DotEnvTest.php b/test/phpUnitTests/DotEnvTest.php
index e7bd391..f87ceb6 100644
--- a/test/phpUnitTests/DotEnvTest.php
+++ b/test/phpUnitTests/DotEnvTest.php
@@ -45,36 +45,42 @@ final class DotEnvTest extends TestCase
 		// 1: file, if unset .env
 		// 2: status to be returned
 		// 3: _ENV file content to be set
+		// 4: override chmod as octect in string
 		return [
 			'default' => [
 				'folder' => null,
 				'file' => null,
 				'status' => 3,
 				'content' => [],
+				'chmod' => null,
 			],
 			'cannot open file' => [
 				'folder' => __DIR__ . DIRECTORY_SEPARATOR . 'dotenv',
 				'file' => 'cannot_read.env',
 				'status' => 2,
 				'content' => [],
+				'chmod' => '000',
 			],
 			'empty file' => [
 				'folder' => __DIR__ . DIRECTORY_SEPARATOR . 'dotenv',
 				'file' => 'empty.env',
 				'status' => 1,
 				'content' => [],
+				'chmod' => null,
 			],
 			'override all' => [
 				'folder' => __DIR__ . DIRECTORY_SEPARATOR . 'dotenv',
 				'file' => 'test.env',
 				'status' => 0,
 				'content' => $dot_env_content,
+				'chmod' => null,
 			],
 			'override directory' => [
 				'folder' => __DIR__ . DIRECTORY_SEPARATOR . 'dotenv',
 				'file' => null,
 				'status' => 0,
 				'content' => $dot_env_content,
+				'chmod' => null,
 			],
 		];
 	}
@@ -90,14 +96,26 @@ final class DotEnvTest extends TestCase
 	 * @param  string|null $file
 	 * @param  int         $expected_status
 	 * @param  array       $expected_env
+	 * @param  string|null $chmod
 	 * @return void
 	 */
 	public function testReadEnvFile(
 		?string $folder,
 		?string $file,
 		int $expected_status,
-		array $expected_env
+		array $expected_env,
+		?string $chmod
 	): void {
+		// if we have file + chmod set
+		$old_chmod = null;
+		if (
+			is_file($folder . DIRECTORY_SEPARATOR . $file) &&
+			!empty($chmod)
+		) {
+			// get the old permissions
+			$old_chmod = fileperms($folder . DIRECTORY_SEPARATOR . $file);
+			chmod($folder . DIRECTORY_SEPARATOR . $file, octdec($chmod));
+		}
 		if ($folder !== null && $file !== null) {
 			$status = \gullevek\dotEnv\DotEnv::readEnvFile($folder, $file);
 		} elseif ($folder !== null) {
@@ -116,6 +134,10 @@ final class DotEnvTest extends TestCase
 			$expected_env,
 			'Assert _ENV correct'
 		);
+		// if we have file and chmod unset
+		if ($old_chmod !== null) {
+			chmod($folder . DIRECTORY_SEPARATOR . $file, $old_chmod);
+		}
 	}
 }