diff --git a/internal/flags/flags.go b/internal/flags/flags.go
index 163eefc..356c16f 100644
--- a/internal/flags/flags.go
+++ b/internal/flags/flags.go
@@ -304,7 +304,7 @@ func SetDefaults() {
 	viper.AutomaticEnv()
 	viper.SetDefault("DOCKER_HOST", "unix:///var/run/docker.sock")
 	viper.SetDefault("DOCKER_API_VERSION", DockerAPIMinVersion)
-	viper.SetDefault("WATCHTOWER_POLL_INTERVAL", day)
+	viper.SetDefault("WATCHTOWER_POLL_INTERVAL", day.Seconds())
 	viper.SetDefault("WATCHTOWER_TIMEOUT", time.Second*10)
 	viper.SetDefault("WATCHTOWER_NOTIFICATIONS", []string{})
 	viper.SetDefault("WATCHTOWER_NOTIFICATIONS_LEVEL", "info")