diff --git a/composer.json b/composer.json
index 3f874d9..52cce4f 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,9 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6",
-        "squizlabs/php_codesniffer": "^3"
+        "squizlabs/php_codesniffer": "^3",
+        "silverstripe/standards": "^1",
+        "phpstan/extension-installer": "^1.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..beb9de3
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,3 @@
+parameters:
+  paths:
+    - src
diff --git a/src/Extensions/LDAPGroupExtension.php b/src/Extensions/LDAPGroupExtension.php
index 6f9c229..e52cdcc 100644
--- a/src/Extensions/LDAPGroupExtension.php
+++ b/src/Extensions/LDAPGroupExtension.php
@@ -10,13 +10,14 @@
 use SilverStripe\Forms\ReadonlyField;
 use SilverStripe\LDAP\Model\LDAPGroupMapping;
 use SilverStripe\ORM\DataExtension;
+use SilverStripe\ORM\HasManyList;
 
 /**
  * Class LDAPGroupExtension
  *
  * Adds a field to map an LDAP group to a SilverStripe {@link Group}
  *
- * @method SilverStripe\ORM\HasManyList<LDAPGroupMapping> LDAPGroupMappings()
+ * @method HasManyList<LDAPGroupMapping> LDAPGroupMappings()
  *
  * @extends DataExtension<Group&static>
  */