diff --git a/Parser/ValidationParser.php b/Parser/ValidationParser.php
index d5d5ad5..e7df881 100644
--- a/Parser/ValidationParser.php
+++ b/Parser/ValidationParser.php
@@ -125,6 +125,7 @@ class ValidationParser implements ParserInterface, PostParserInterface
 
         switch ($class) {
             case 'NotBlank':
+                $vparams['format'][] = '{not blank}';
             case 'NotNull':
                 $vparams['required'] = true;
                 break;