diff --git a/config.yaml b/config.yaml
index ef88f19..c23d5a7 100644
--- a/config.yaml
+++ b/config.yaml
@@ -95,8 +95,8 @@ watchdog:
   apiUrl: ""
   # watchdog server listen http port at: 13081
   port: 13081
-  # the interval of query data from chain for each miner, 30 <= scrapeInterval <= 300
-  scrapeInterval: 60
+  # the interval of query data from chain for each miner, 1800 <= scrapeInterval <= 3600
+  scrapeInterval: 1800
   # watchdog can scrape miners data from this hosts
   hosts:
     - ip: 127.0.0.1 # 127.x, 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 is a private IP