diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.3.9.2
+### Changed
+* Update Docker base image from alpine:3.7 to alpine:3.9
+
 ## 0.3.9.1
 ### Added
 * Add timestamp to output commands:
diff --git a/Dockerfile b/Dockerfile
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build Hapistrano
-FROM alpine:3.7 as build-env
+FROM alpine:3.9 as build-env
 
 MAINTAINER Javier Casas <jcasas@stackbuilders.com>
 
@@ -42,11 +42,13 @@
 RUN upx /hapistrano/dist/build/hap/hap
 
 # Copy Hapistrano to a basic Alpine with SSH
-FROM alpine:3.7
+FROM alpine:3.9
 
 RUN apk update \
  && apk add \
-        openssh-client
+        openssh-client \
+        ca-certificates \
+        git
 
 RUN mkdir ~/.ssh
 
diff --git a/hapistrano.cabal b/hapistrano.cabal
--- a/hapistrano.cabal
+++ b/hapistrano.cabal
@@ -1,5 +1,5 @@
 name:                hapistrano
-version:             0.3.9.1
+version:             0.3.9.2
 synopsis:            A deployment library for Haskell applications
 description:
   .