diff --git a/build/images/manager/Dockerfile b/build/images/manager/Dockerfile
index 1663bd76f..66c3fbf1f 100644
--- a/build/images/manager/Dockerfile
+++ b/build/images/manager/Dockerfile
@@ -12,8 +12,6 @@ RUN make build-manager && make install-manager
 
 FROM alpine:3.12
 
-RUN apk add --no-cache netcat-openbsd
-
 ENV PATH=/opt/dragonfly/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 
 COPY --from=builder /go/src/d7y.io/dragonfly/v2/hack/wait-for.sh /root/wait-for.sh