diff --git a/composer.json b/composer.json
index 2d1d772..d6b0cab 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
   "license": "GPL-3.0-or-later",
   "name": "potherca/phpunit-testcase-traits",
   "require": {
-    "php": "~5.3 | ~7.0",
+    "php": "8.3.7",
     "phpunit/phpunit": "~4.0 | ~5.0 | ~6.0"
   },
   "type": "library"