diff --git a/src/Client/RedmineClient.php b/src/Client/RedmineClient.php
index 4978ad3..2ef6294 100644
--- a/src/Client/RedmineClient.php
+++ b/src/Client/RedmineClient.php
@@ -22,12 +22,11 @@ final class RedmineClient
     {
         $cacheKey = sprintf('%s_%s_%s', $api, $method, sha1(serialize($arguments)));
 
-        return $this->cache->get($cacheKey, function (ItemInterface $item) use ($api, $method): array {
+        return $this->cache->get($cacheKey, function (ItemInterface $item) use ($api, $method, $arguments): array {
             $item->expiresAfter(3600);
             $item->tag([$api, $method]);
 
             $client = $this->getClient()->getApi($api);
-            $arguments = is_array($arguments) ? $arguments : [];
             $value = \call_user_func_array([$client, $method], $arguments);
 
             return $value;