diff --git a/src/Service/TravelDataService.php b/src/Service/TravelDataService.php
index b06667a..e0a5e46 100644
--- a/src/Service/TravelDataService.php
+++ b/src/Service/TravelDataService.php
@@ -31,10 +31,10 @@ use Symfony\Contracts\Cache\ItemInterface;
  */
 class TravelDataService
 {
-    public const SOURCE_LOCAL = 'local';
-    public const SOURCE_REMOTE = 'remote';
-    private const AVAILABILITY_CACHE_TTL = 600;
-    private const MUTABILITY_CACHE_TTL = 3600;
+    public const string SOURCE_LOCAL = 'local';
+    public const string SOURCE_REMOTE = 'remote';
+    private const int AVAILABILITY_CACHE_TTL = 600;
+    private const int MUTABILITY_CACHE_TTL = 300;
 
     public function __construct(
         private readonly TravelLoader $travelLoader,
@@ -440,7 +440,7 @@ class TravelDataService
      * Gets mutability data for a travel date.
      *
      * @param int  $dateId       The travel date ID for API call
-     * @param bool $cached       Whether to use cached data (default: true, TTL: 1 hour)
+     * @param bool $cached       Whether to use cached data (default: true, TTL: 5 minutes)
      * @param bool $forceRefresh Whether to invalidate cache before fetching (requires cached: true)
      *
      * @return BaseData|null The mutability data or null if not available or error occurred
@@ -456,7 +456,6 @@ class TravelDataService
                 }
 
                 return $this->cache->get($cacheKey, function (ItemInterface $item) use ($dateId) {
-                    // 1 hour TTL - better safe than sorry with mutability changes
                     $item->expiresAfter(self::MUTABILITY_CACHE_TTL);
 
                     return $this->fetchMutabilityData($dateId);