diff --git a/Dockerfile b/Dockerfile
index 66bfcb4c05e0919d33cc4d19b5200d408e6e9acc..f4caaf97091779da1795c213aff585ca41134442 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:stretch
+FROM debian:stretch-slim
 ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update && \
     apt-get install -y knot-dnsutils knot-host knot-resolver dma bsd-mailx && \
diff --git a/entrypoint.sh b/entrypoint.sh
index 9083753042da84f61f7d175b79486767e77b7a70..f7dc3004a73f169671a561fb59617739ede66ade 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -2,4 +2,4 @@
 set -eu
 service kresd start
 echo 'nameserver 127.0.0.1' > /etc/resolv.conf
-exec $@
+eval "exec $@"