diff --git a/composer.json b/composer.json
index 9d5bd2a..d465543 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "require-dev": {
         "phpunit/phpunit": "^9.0",
         "php-coveralls/php-coveralls": "^2.2",
-        "vimeo/psalm": "5.14.1"
+        "vimeo/psalm": "5.15.0"
     },
     "autoload": {
         "psr-4": {