diff --git a/Dockerfile b/Dockerfile
index 3414079..62703e3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM openfaas/classic-watchdog:0.13.4 as watchdog
+FROM openfaas/classic-watchdog:0.20.1 as watchdog
 
 FROM alpine:3.8
 ENTRYPOINT []