diff --git a/composer.json b/composer.json
index 7d8c446..7d519e9 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
 		"mathematicator-core/vizualizator": "^2.0 || ^3.0"
 	},
 	"require-dev": {
-		"phpstan/phpstan": "^0.12.74",
+		"phpstan/phpstan": "^0.12.74 || ^1.0.0",
 		"tracy/tracy": "^2.8",
 		"phpstan/phpstan-nette": "^0.12.14",
 		"spaze/phpstan-disallowed-calls": "^1.1",