diff --git a/composer.json b/composer.json
index 91a163b..821f76a 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
     "kahlan/kahlan": "^5.1.3",
     "prooph/php-cs-fixer-config": "^0.5.0",
     "satooshi/php-coveralls": "^2.2",
-    "vimeo/psalm": "^4.0.1"
+    "vimeo/psalm": "^5.7.7"
   },
   "bin": [
     "bin/fpp"