diff --git a/pkg/router-tuto3/Dockerfile b/pkg/router-tuto3/Dockerfile
index f0ba3fc..d203800 100644
--- a/pkg/router-tuto3/Dockerfile
+++ b/pkg/router-tuto3/Dockerfile
@@ -9,6 +9,7 @@ RUN mkdir -p /var/lock/ && opkg update && opkg install \
     msmtp \
     python3 \
     tcpdump \
+  && rm /etc/resolv.conf \
   && rm -rf /var/lock \
   && rm -rf /etc/ssh/ssh_host_*_key* \
   && echo "alias ip='ip -c'" >> /etc/profile