diff --git a/Dockerfile.nps b/Dockerfile.nps
index 01e7f9ec..f73ac712 100755
--- a/Dockerfile.nps
+++ b/Dockerfile.nps
@@ -9,4 +9,4 @@ FROM scratch
 COPY --from=builder /go/src/ehang.io/nps/nps /
 COPY --from=builder /go/src/ehang.io/nps/web /web
 VOLUME /conf
-CMD ["/nps"]
+CMD ["/nps", "service"]