diff --git a/code/Extension/UserFormFieldEditorExtension.php b/code/Extension/UserFormFieldEditorExtension.php
index 62b37e1..682d6a9 100644
--- a/code/Extension/UserFormFieldEditorExtension.php
+++ b/code/Extension/UserFormFieldEditorExtension.php
@@ -16,6 +16,7 @@ use SilverStripe\Forms\GridField\GridFieldToolbarHeader;
 use SilverStripe\ORM\DataExtension;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\DataObject;
+use SilverStripe\ORM\HasManyList;
 use SilverStripe\UserForms\Form\GridFieldAddClassesButton;
 use SilverStripe\UserForms\Model\EditableFormField;
 use SilverStripe\UserForms\Model\EditableFormField\EditableFieldGroup;
@@ -29,7 +30,7 @@ use Symbiote\GridFieldExtensions\GridFieldEditableColumns;
 use Symbiote\GridFieldExtensions\GridFieldOrderableRows;
 
 /**
- * @method SilverStripe\ORM\HasManyList<EditableFormField> Fields()
+ * @method HasManyList<EditableFormField> Fields()
  */
 class UserFormFieldEditorExtension extends DataExtension
 {
diff --git a/composer.json b/composer.json
index 96ca1b0..908e99b 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,9 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6",
-        "squizlabs/php_codesniffer": "^3"
+        "squizlabs/php_codesniffer": "^3",
+        "silverstripe/standards": "^1",
+        "phpstan/extension-installer": "^1.3"
     },
     "conflict": {
         "egulias/email-validator": "^2"
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
new file mode 100644
index 0000000..d10aea0
--- /dev/null
+++ b/phpstan.neon.dist
@@ -0,0 +1,3 @@
+parameters:
+  paths:
+    - code