diff --git a/Dockerfile b/Dockerfile
index 130a2f5d..27660b5b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.5
 MAINTAINER Dalton Hubble <dalton.hubble@coreos.com>
 COPY bin/matchbox /matchbox
 EXPOSE 8080
diff --git a/contrib/dnsmasq/Dockerfile b/contrib/dnsmasq/Dockerfile
index dc33eb40..284fbe2b 100644
--- a/contrib/dnsmasq/Dockerfile
+++ b/contrib/dnsmasq/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.5
 MAINTAINER Dalton Hubble <dalton.hubble@coreos.com>
 RUN apk -U add dnsmasq curl
 COPY tftpboot /var/lib/tftpboot