diff --git a/composer.json b/composer.json
index 1b708e8..3c953f3 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,8 @@
         "issues": "https://github.com/linna/csrf-guard/issues"
     },
     "require": {
-        "php": ">=7.4"
+        "php": ">=7.4",
+        "ext-hash": "*"
     },
     "require-dev": {
         "infection/infection": "^0.20",