diff --git a/src/fields/Width.php b/src/fields/Width.php
index e859d78..94a8aa1 100644
--- a/src/fields/Width.php
+++ b/src/fields/Width.php
@@ -146,7 +146,7 @@ public function getContentColumnType(): string
      *
      * @return mixed The prepared field value
      */
-    public function normalizeValue($value, ElementInterface $element = null):? string
+    public function normalizeValue($value, ElementInterface $element = null): ?string
     {
         return $value;
     }