diff --git a/sample-functions/Nmap/Dockerfile b/sample-functions/Nmap/Dockerfile
index e0eb45708d47b8361accaa952a07badf45311512..013a17d7f9ff1329ea3f7fc95c542ff777790065 100644
--- a/sample-functions/Nmap/Dockerfile
+++ b/sample-functions/Nmap/Dockerfile
@@ -1,4 +1,9 @@
-FROM functions/alpine:latest
+FROM openfaas/classic-watchdog:0.14.4 as watchdog
+
+FROM alpine:3.10
+
+COPY --from=watchdog /fwatchdog /usr/bin/fwatchdog
+RUN chmod +x /usr/bin/fwatchdog
 
 RUN apk add --no-cache nmap