diff --git a/build/app/Dockerfile b/build/app/Dockerfile
index 8a4e356..157c1c9 100644
--- a/build/app/Dockerfile
+++ b/build/app/Dockerfile
@@ -1,6 +1,7 @@
 FROM golang:1.16.2
 
 ENV GO111MODULE=off
+RUN apt-get update && apt-get -y install dnsutils
 RUN go get -u -d g.phga.de/phga/dd/...
 WORKDIR /go/src/g.phga.de/phga/dd/cmd/dd
 RUN go build