diff --git a/pkg/db/backend.go b/pkg/db/backend.go
index 9bb49ac..96829c5 100644
--- a/pkg/db/backend.go
+++ b/pkg/db/backend.go
@@ -103,7 +103,7 @@
 			logger.Debug("update-liveness-channel-reason-change")
 			b.liveness <- alive
 			b.lastLivenessTime = time.Now()
-		} else if time.Now().Sub(b.lastLivenessTime) > b.LivenessChannelInterval {
+		} else if time.Since(b.lastLivenessTime) > b.LivenessChannelInterval {
 			logger.Debug("update-liveness-channel-reason-interval")
 			b.liveness <- alive
 			b.lastLivenessTime = time.Now()