diff --git a/Dockerfile b/Dockerfile
index 5ee53eb..4877a7b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.8
+FROM alpine:3.9
 LABEL maintainer="mario.siegenthaler@linkyard.ch"
 
 RUN apk --no-cache add bash
@@ -6,7 +6,7 @@ RUN apk --no-cache add --update curl wget ca-certificates
 RUN apk --no-cache add jq
 RUN apk --no-cache add gnupg
 
-ENV SPRUCE_VERSION 1.18.2
+ENV SPRUCE_VERSION 1.20.0
 RUN wget https://github.com/geofffranks/spruce/releases/download/v${SPRUCE_VERSION}/spruce-linux-amd64 \
   && chmod a+x spruce-linux-amd64 \
   && mv spruce-linux-amd64 /usr/local/bin/spruce