diff --git a/composer.json b/composer.json
index 6d63227..55588b4 100644
--- a/composer.json
+++ b/composer.json
@@ -23,8 +23,10 @@
         "codeigniter4/settings": "^2.0"
     },
     "require-dev": {
+        "codeigniter/coding-standard": "1.7.*",
         "codeigniter4/devkit": "^1.0",
         "codeigniter4/framework": "^4.1",
+        "phpunit/phpunit": "^9.6",
         "rector/rector": "1.1.1"
     },
     "minimum-stability": "dev",
diff --git a/psalm.xml b/psalm.xml
index 386f4dc..976c974 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0"?>
 <psalm
+    phpVersion="8.1"
     errorLevel="7"
     resolveFromConfigFile="true"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -7,6 +8,8 @@
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
     autoloader="psalm_autoload.php"
     cacheDirectory="build/psalm/"
+    findUnusedBaselineEntry="false"
+    findUnusedCode="false"
 >
     <projectFiles>
         <directory name="src/" />
diff --git a/psalm_autoload.php b/psalm_autoload.php
index fefb1c3..0ff5a55 100644
--- a/psalm_autoload.php
+++ b/psalm_autoload.php
@@ -11,6 +11,10 @@
 
 foreach ($helperDirs as $dir) {
     $dir = __DIR__ . '/' . $dir;
+    if (! is_dir($dir)) {
+        continue;
+    }
+
     chdir($dir);
 
     foreach (glob('*_helper.php') as $filename) {
@@ -19,3 +23,5 @@
         require_once $filePath;
     }
 }
+
+chdir(__DIR__);