diff --git a/src/Components/SchemaToOpenApiDefinition.php b/src/Components/SchemaToOpenApiDefinition.php
index <HASH>..<HASH> 100644
--- a/src/Components/SchemaToOpenApiDefinition.php
+++ b/src/Components/SchemaToOpenApiDefinition.php
@@ -63,7 +63,7 @@ trait SchemaToOpenApiDefinition
         return [
             'type'        => $type,
             'format'      => $format,
-            'description' => $column->comment,
+            'description' => strval($column->comment),
         ];
     }
OpenApiDefinition requires description to be string, not null