diff --git a/phpstan.neon b/phpstan.neon
index d7f8277..c308dcf 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,4 +1,4 @@
 parameters:
-	level: 6
+	level: 8
 	paths:
 		- src
diff --git a/src/Container.php b/src/Container.php
index b8c613b..c55a0ab 100644
--- a/src/Container.php
+++ b/src/Container.php
@@ -56,7 +56,7 @@ public function get(string $name)
 
                     ksort($activations, SORT_NUMERIC); // order by activation depth
 
-                    $activations = array_slice($activations, array_search($name, $activations, true));
+                    $activations = array_slice($activations, array_search($name, $activations, true) ?: 0);
 
                     $activations[] = $name;