diff --git a/src/Exception/LeanApiException.php b/src/Exception/LeanApiException.php
new file mode 100644
index 0000000..b405bdd
--- /dev/null
+++ b/src/Exception/LeanApiException.php
@@ -0,0 +1,5 @@
+<?php
+
+namespace Lean\Api\Exception;
+
+class LeanApiException extends \InvalidArgumentException {}
\ No newline at end of file
diff --git a/src/Exception/MandatoryFieldException.php b/src/Exception/MandatoryFieldException.php
index ab67195..be81edd 100644
--- a/src/Exception/MandatoryFieldException.php
+++ b/src/Exception/MandatoryFieldException.php
@@ -2,4 +2,4 @@
 
 namespace Lean\Api\Exception;
 
-class MandatoryFieldException extends \InvalidArgumentException {}
\ No newline at end of file
+class MandatoryFieldException extends LeanApiException {}
\ No newline at end of file
diff --git a/src/Exception/MaximumLengthException.php b/src/Exception/MaximumLengthException.php
index b5cab79..8a9eae2 100644
--- a/src/Exception/MaximumLengthException.php
+++ b/src/Exception/MaximumLengthException.php
@@ -2,4 +2,4 @@
 
 namespace Lean\Api\Exception;
 
-class MaximumLengthException extends \InvalidArgumentException {}
\ No newline at end of file
+class MaximumLengthException extends LeanApiException {}
\ No newline at end of file
diff --git a/src/Exception/MinimumLengthException.php b/src/Exception/MinimumLengthException.php
index d3feaa9..e0c0a24 100644
--- a/src/Exception/MinimumLengthException.php
+++ b/src/Exception/MinimumLengthException.php
@@ -2,4 +2,4 @@
 
 namespace Lean\Api\Exception;
 
-class MinimumLengthException extends \InvalidArgumentException {}
\ No newline at end of file
+class MinimumLengthException extends LeanApiException {}
\ No newline at end of file
diff --git a/src/Exception/RegexFormatException.php b/src/Exception/RegexFormatException.php
index ca45444..fbbf0e7 100644
--- a/src/Exception/RegexFormatException.php
+++ b/src/Exception/RegexFormatException.php
@@ -2,4 +2,4 @@
 
 namespace Lean\Api\Exception;
 
-class RegexFormatException extends \InvalidArgumentException {}
\ No newline at end of file
+class RegexFormatException extends LeanApiException{}
\ No newline at end of file
diff --git a/src/Form/Save.php b/src/Form/Save.php
index d21fe9c..2fb6fb0 100644
--- a/src/Form/Save.php
+++ b/src/Form/Save.php
@@ -6,7 +6,9 @@ use CSLSJ\Lean\Form\Session\EmailContext;
 use Picea\Ui\Method\{FormContext, FormContextInterface};
 
 use Lean\Api\Attribute\ContextField;
+use Lean\Api\Exception\LeanApiException;
 use Lean\Api\Exception\MandatoryFieldException;
+use Lean\Api\Exception\MinimumLengthException;
 use Notes\Common\ReflectedProperty;
 use Notes\ObjectReflection;
 use Ulmus\Attribute\Property\Field;
@@ -107,9 +109,8 @@ abstract class Save extends Form implements \Picea\Ui\Method\FormInterface {
             if ($attribute) {
                 try {
                     $attribute->object->assertValueSpecs($context->$name ?? null, ! $this->getEntity()->isLoaded());
-                }
-                catch(\Throwable $ex) {
-                    throw new MandatoryFieldException("An error occured with field '$name': " . $ex->getMessage());
+                } catch (LeanApiException $e) {
+                    throw new MandatoryFieldException("An error occured with field '$name': " . $e->getMessage());
                 }
             }
         }