diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab00178a..69c82c66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All notable changes to `data-transfer-object` will be documented in this file
 
+## 1.9.1 - 2019-10-03
+
+- Improve type error message
+
 ## 1.9.0 - 2019-08-30
 
 - Add DataTransferObjectCollection::items() 
diff --git a/src/DataTransferObjectError.php b/src/DataTransferObjectError.php
index a8a4ae1b..d426f299 100644
--- a/src/DataTransferObjectError.php
+++ b/src/DataTransferObjectError.php
@@ -31,7 +31,9 @@ public static function invalidType(Property $property, $value): DataTransferObje
 
         $expectedTypes = implode(', ', $property->getTypes());
 
-        return new self("Invalid type: expected {$property->getFqn()} to be of type {$expectedTypes}, instead got value `{$value}`.");
+        $currentType = gettype($value);
+
+        return new self("Invalid type: expected {$property->getFqn()} to be of type {$expectedTypes}, instead got value `{$value}` ({$currentType}).");
     }
 
     public static function uninitialized(Property $property): DataTransferObjectError