diff --git a/.gitignore b/.gitignore
index 7099cae..2671f03 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 *.o
 .deps
 .libs
+Dockerfile.tmp
 Makefile
 Makefile.fragments
 Makefile.global
diff --git a/.travis.yml b/.travis.yml
index 765893d..d5fb6e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,15 +1,21 @@
 language: php
 sudo: required
-dist: trusty
 
-php:
-  - 7.0
-  - 7.1
+services:
+  - docker
 
 env:
-  - V8VER=5.2
-  - V8VER=5.1
+  - V8VER=6.5
+    PHPVER=7.0
+  - V8VER=6.4
+    PHPVER=7.0
+  - V8VER=6.5
+    PHPVER=7.1
+  - V8VER=6.4
+    PHPVER=7.1
+  - V8VER=6.5
+    PHPVER=7.2
+  - V8VER=6.4
+    PHPVER=7.2
 
-before_install: make -f Makefile.travis before_install
-install: make -f Makefile.travis install
 script: make -f Makefile.travis test
diff --git a/Commandfile b/Commandfile
index 9000767..35b6fee 100644
--- a/Commandfile
+++ b/Commandfile
@@ -11,7 +11,7 @@ command 'configure',
   description: 'executes "configure" to prepare build',
   parameters: {
     cxxflags: { default: "-ggdb -Wall -Wno-write-strings" },
-    ldflags: { default: "-ggdb" },
+    ldflags: { default: "-ggdb -lstdc++" },
   },
   script: <<-eof
     bash -c 'cd /data/build; ../v8js/configure `bash -c "if test -d /opt/libv8-*; then echo -n --with-v8js=; echo /opt/libv8-*; fi"` `test -d "/usr/lib64" && echo --with-libdir=lib64` CXXFLAGS="%{cxxflags}" LDFLAGS="%{ldflags}"'
diff --git a/Dockerfile.travis b/Dockerfile.travis
new file mode 100644
index 0000000..7fbc4a3
--- /dev/null
+++ b/Dockerfile.travis
@@ -0,0 +1,22 @@
+FROM ubuntu:xenial
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV LC_ALL=C.UTF-8
+ENV NO_INTERACTION=1
+ENV REPORT_EXIT_STATUS=1
+
+RUN apt-get update -q
+RUN apt-get install -y software-properties-common
+
+RUN add-apt-repository ppa:ondrej/php
+RUN add-apt-repository ppa:pinepain/libv8-$V8VER -y
+RUN apt-get update -q
+
+RUN apt-get install -y php$PHPVER-dev libv8-$V8VER-dev
+
+ADD . /app
+WORKDIR /app
+
+RUN phpize
+RUN ./configure CXXFLAGS="-Wall -Wno-write-strings -Werror" LDFLAGS="-lstdc++" --with-v8js=/opt/libv8-$V8VER/
+RUN make -j4
diff --git a/Makefile.travis b/Makefile.travis
index 18a3c08..e5de874 100644
--- a/Makefile.travis
+++ b/Makefile.travis
@@ -1,20 +1,14 @@
 # Configure and build scripts for travis CI system
-V8VER ?= 5.1
+V8VER ?= 6.3
+
+IMAGENAME ?= v8js-test
 
 export NO_INTERACTION=1
 export REPORT_EXIT_STATUS=1
 
-before_install:
-	sudo add-apt-repository ppa:pinepain/libv8-$(V8VER) -y
-	sudo apt-get update -q
-
-install:
-	sudo apt-get install -y libv8-$(V8VER)-dev
-
 build:
-	phpize
-	./configure CXXFLAGS="-Wall -Wno-write-strings -Werror"
-	$(MAKE) -j3
+	envsubst < Dockerfile.travis > Dockerfile.tmp
+	docker build -t $(IMAGENAME) -f Dockerfile.tmp .
 
 test: build
-	$(MAKE) test
+	docker run --rm -t $(IMAGENAME) make test
diff --git a/README.md b/README.md
index 821e9d2..b35b867 100644
--- a/README.md
+++ b/README.md
@@ -42,11 +42,10 @@ For some very first steps, instead of compiling manually you might want to try o
 image](https://registry.hub.docker.com/u/stesie/v8js/).  It has v8, v8js and php-cli pre-installed
 so you can give it a try with PHP in "interactive mode".  There is no Apache, etc. running however.
 
-For Ubuntu @pinepain has PPAs for V8 [5.1](https://launchpad.net/~pinepain/+archive/ubuntu/libv8-5.1)
-and [5.2](https://launchpad.net/~pinepain/+archive/ubuntu/libv8-5.2).  You might want to install
-these (and compile V8Js based on them).
+For Ubuntu @pinepain has PPAs for [various versions of V8](https://launchpad.net/~pinepain).
+You might want to install these and compile V8Js based on them.
 
-There also is a Heroku extension pack that has recent V8Js versions for both PHP 5.6 and 7.0, see
+There also is a Heroku extension pack that has recent V8Js versions for PHP 7.x, see
 [@stesie's blog post](https://stesie.github.io/2016/03/heroku-custom-platform-repo) for details.
 
 Last but not least there are binaries for Windows (PHP7, x86 including V8 4.9.385.29) that you can use
diff --git a/Vagrantfile b/Vagrantfile
index 1da40b0..d998dad 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -11,6 +11,7 @@ Vagrant.configure("2") do |config|
   config.vm.box = "ubuntu/xenial64"
 
   config.vm.provider "lxc" do |lxc, override|
+    lxc.backingstore = "none"
     override.vm.box = "zaikin/xenial64-lxc"
   end
 
@@ -18,7 +19,7 @@ Vagrant.configure("2") do |config|
   #
   # mass-define "generic" Ubuntu boxes
   #
-  %w{5.7 5.8 5.9 6.0 6.3}.each { |version|
+  %w{6.3 6.4 6.5}.each { |version|
     config.vm.define "v8-#{version}" do |i|
       i.vm.synced_folder ".", "/data/v8js"
 
@@ -37,7 +38,7 @@ Vagrant.configure("2") do |config|
     end
   }
 
-  %w{5.9.35 6.0.318}.each { |version|
+  %w{}.each { |version|
     config.vm.define "v8-#{version}" do |i|
       i.vm.synced_folder ".", "/data/v8js"
 
@@ -143,29 +144,6 @@ Vagrant.configure("2") do |config|
     SHELL
   end
 
-
-  #
-  # ubuntu xenial(16.04) box with PHP 7.1.3, V8 5.2
-  # (to reproduce issue #304)
-  #
-  config.vm.define "xenial-v8-5.2" do |i|
-    i.vm.box = "ubuntu/xenial64"
-    i.vm.synced_folder ".", "/data/v8js"
-
-    i.vm.provision "shell", inline: <<-SHELL
-    gpg --keyserver keys.gnupg.net --recv 7F438280EF8D349F
-    gpg --armor --export 7F438280EF8D349F | apt-key add -
-
-    apt-get update
-    apt-get install -y software-properties-common gdb tmux git tig curl apache2-utils lcov
-
-    add-apt-repository ppa:ondrej/php
-    add-apt-repository ppa:pinepain/libv8-5.2
-    apt-get update
-    apt-get install -y php7.1-dev libv8-5.2-dbg libv8-5.2-dev
-  SHELL
-  end
-
   config.vm.define "macos-sierra" do |i|
     i.vm.box = "gobadiah/macos-sierra"