diff --git a/composer.json b/composer.json
index 10a766e..a739a45 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     ,
     "require-dev": {
         "roave/security-advisories": "dev-master",
-        "vimeo/psalm": "^4.3.1",
+        "vimeo/psalm": "^5.26.1",
         "phpmd/phpmd": "^2.9",
         "squizlabs/php_codesniffer": "^3.5",
         "phpro/grumphp": "^0.19 || ^1.2.0"