diff --git a/src/Client/RedmineClient.php b/src/Client/RedmineClient.php
index 8f2c527..401b742 100644
--- a/src/Client/RedmineClient.php
+++ b/src/Client/RedmineClient.php
@@ -32,7 +32,7 @@ final class RedmineClient
     {
         $cacheKey = sprintf('%s_%s_%s', $api, $method, sha1(serialize($arguments)));
 
-        return $this->cache->get($cacheKey, function (ItemInterface $item): string {
+        return $this->cache->get($cacheKey, function (ItemInterface $item) use ($api, $method): array {
             $item->expiresAfter(3600);
             $item->tag([$api, $method]);