diff --git a/composer.json b/composer.json
index ffae108..c461b9e 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
   },
   "require-dev": {
     "brianium/paratest": "^6.4.1",
-    "psalm/plugin-phpunit": "^0.16.1",
+    "psalm/plugin-phpunit": "^0.18.1",
     "squizlabs/php_codesniffer": "^3.6.2",
     "vimeo/psalm": "^4.16.1"
   },