diff --git a/src/Forms/Helpers.php b/src/Forms/Helpers.php
index 6d1a1317..3a2fdb48 100644
--- a/src/Forms/Helpers.php
+++ b/src/Forms/Helpers.php
@@ -70,7 +70,7 @@ private static function sanitize(int $type, $value)
 	{
 		if ($type === Form::DataText) {
 			return is_scalar($value)
-				? Strings::normalizeNewLines($value)
+				? Strings::normalizeNewLines((string) $value)
 				: null;
 
 		} elseif ($type === Form::DataLine) {