diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
index 3d392bd..2a46cce 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
@@ -27,8 +27,7 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
       ->setRequired(TRUE);
 
     $properties['format'] = DataDefinition::create('filter_format')
-      ->setLabel(t('Text format'))
-      ->setRequired(TRUE);
+      ->setLabel(t('Text format'));
 
     $properties['processed'] = DataDefinition::create('string')
       ->setLabel(t('Processed text'))