diff --git a/composer.json b/composer.json
index cb10b6c..deaf56d 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
         "phpstan/phpstan-mockery": "^1.0",
         "phpstan/phpstan-phpunit": "^1.1",
         "psalm/plugin-mockery": "^1.0.0",
-        "psalm/plugin-phpunit": "^0.19.0",
+        "psalm/plugin-phpunit": "^0.20.0",
         "ramsey/coding-standard": "^2.0.3",
         "ramsey/composer-repl": "^1.4",
         "ramsey/conventional-commits": "^1.3",