diff --git a/src/Collection.php b/src/Collection.php
index 9711ba8..da25b3e 100644
--- a/src/Collection.php
+++ b/src/Collection.php
@@ -3,10 +3,11 @@
 namespace Kletellier\PdoWrapper;
 
 use ArrayIterator;
+use Countable;
 use IteratorAggregate;
 use Traversable;
 
-class Collection implements IteratorAggregate
+class Collection implements IteratorAggregate, Countable
 {
     private array $elements;