diff --git a/Dockerfile b/Dockerfile
index 6ebcbc0..1df118f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@
 #   docker build --no-cache -t local/travis .
 #
 
-FROM ruby:alpine@sha256:a451f1b40f702fbe104eeea7e24afa6645988f255446874094ff90014e44f05b
+FROM ruby:alpine@sha256:7fdd3e9ab2f9797c280deeb1a97d8158b28bd33eb98531b928cb006270712d2e
 
 RUN set -xe \
   && apk add --no-cache --virtual .build-deps \