diff --git a/phpstan.neon b/phpstan.neon
index 54e6f5d..ec605ef 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,5 +1,5 @@
 parameters:
-	level: 6
+	level: 9
 	paths:
 		- src
 		- tests