diff --git a/composer.json b/composer.json
index e339465..f2aa00a 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
     "require-dev": {
         "nette/tester": "2.4.2",
         "mockery/mockery": "1.5.0",
-        "phpstan/phpstan": "1.5.3",
+        "phpstan/phpstan": "1.6.3",
         "phpstan/phpstan-strict-rules": "1.1.0",
         "phpstan/phpstan-nette": "1.0.0",
         "nepada/phpstan-nette-tester": "0.4.0",