diff --git a/.phive/phars.xml b/.phive/phars.xml
index f648a9f74..da2b40aef 100644
--- a/.phive/phars.xml
+++ b/.phive/phars.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
-  <phar name="phpstan" version="2.1.55" installed="2.1.55" location="./tools/phpstan" copy="false"/>
+  <phar name="phpstan" version="2.3.0" installed="2.3.0" location="./tools/phpstan" copy="false"/>
   <phar name="psalm" version="7.0.0-beta19" installed="7.0.0-beta19" location="./tools/psalm" copy="false"/>
 </phive>
diff --git a/src/Log/Engine/DebugKitLog.php b/src/Log/Engine/DebugKitLog.php
index 32416a3d3..531c7b181 100644
--- a/src/Log/Engine/DebugKitLog.php
+++ b/src/Log/Engine/DebugKitLog.php
@@ -62,7 +62,7 @@ public function all(): array
      */
     public function count(): int
     {
-        return array_reduce($this->_logs, function ($sum, $v) {
+        return array_reduce($this->_logs, function (int $sum, array $v): int {
             return $sum + count($v);
         }, 0);
     }