diff --git a/.circleci/config.yml b/.circleci/config.yml
index dbedca838..b0ff6cf50 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -2,7 +2,7 @@ version: 2
 jobs:
   lint-gitbook:
     docker:
-    - image: jimmysong/gitbook-builder:2019-07-25
+    - image: jimmysong/gitbook-builder:2019-07-31
     working_directory: ~/gitbook
     steps:
     - checkout
diff --git a/Makefile b/Makefile
index ae94b0141..c7a883bcc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 BOOK_NAME := kubernetes-handbook
 BOOK_OUTPUT := _book
-image := jimmysong/gitbook-builder:2019-07-25
+image := jimmysong/gitbook-builder:2019-07-31
 docker := docker run -t -i --sig-proxy=true --rm -v $(shell pwd):/gitbook -w /gitbook -p 4000:4000 $(image)
 
 .PHONY: build
diff --git a/scripts/Dockerfile b/scripts/Dockerfile
index 876995802..7b555ab2f 100644
--- a/scripts/Dockerfile
+++ b/scripts/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.9
 
 MAINTAINER Jimmy Song <rootsongjc@gmail.com>
 
-RUN apk add --no-cache bash git curl jq tar libc6-compat g++
+RUN apk add --no-cache bash git curl jq tar libc6-compat g++ openssh
 
 RUN apk add --no-cache nodejs-current-npm && npm install -g markdown-spellcheck webpack webpack-cli