diff --git a/configs/config.example.yml b/configs/config.example.yml
index 0402413..f7ae528 100644
--- a/configs/config.example.yml
+++ b/configs/config.example.yml
@@ -24,6 +24,8 @@ fcm: # firebase cloud messaging config
   credentials_json: "{}" # firebase credentials json (for public mode only) [FCM__CREDENTIALS_JSON]
   timeout_seconds: 1 # push notification send timeout [FCM__TIMEOUT_SECONDS]
   debounce_seconds: 5 # push notification debounce (>= 5s) [FCM__DEBOUNCE_SECONDS]
+cache: # cache config
+  url: memory:// # cache url (memory:// or redis://) [CACHE__URL]
 tasks: # tasks config
   hashing: # hashing task (hashes processed messages for privacy purposes)
     interval_seconds: 15 # hashing interval in seconds [TASKS__HASHING__INTERVAL_SECONDS]