diff --git a/Dockerfile b/Dockerfile
index f2ac157..cd21ee4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 ## Image name: faucet/base
 
-FROM alpine:3.8
+FROM alpine:3.9
 RUN apk add --no-cache bash su-exec
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
diff --git a/Dockerfile.pi b/Dockerfile.pi
index 538c455..b807a15 100644
--- a/Dockerfile.pi
+++ b/Dockerfile.pi
@@ -1,6 +1,6 @@
 ## Image name: faucet/base-pi
 
-FROM multiarch/alpine:armhf-v3.8
+FROM multiarch/alpine:armhf-v3.9
 RUN apk add --no-cache bash su-exec
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]