diff --git a/.travis.yml b/.travis.yml
index c4bef391b..b4a9d3220 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,18 @@
 language: python
 
+go:
+  - 1.5
+
 services:
   - rabbitmq
   - mysql
 
 # http://docs.travis-ci.com/user/ci-environment/#CI-environment-OS
+# gimme has to be kept in sync with Boulder's Go version setting in .travis.yml
 before_install:
   - travis_retry sudo ./bootstrap/ubuntu.sh
   - travis_retry sudo apt-get install --no-install-recommends nginx-light openssl
+  - '[ "xxx$BOULDER_INTEGRATION" = "xxx" ] || eval "$(gimme 1.5)"'
 
 # using separate envs with different TOXENVs creates 4x1 Travis build
 # matrix, which allows us to clearly distinguish which component under
diff --git a/docs/contributing.rst b/docs/contributing.rst
index 5aa6e3e76..af7945d60 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -67,7 +67,7 @@ The following tools are there to help you:
 Integration
 ~~~~~~~~~~~
 
-First, install `Go`_ 1.4 and start Boulder_, an ACME CA server::
+First, install `Go`_ 1.5 and start Boulder_, an ACME CA server::
 
   ./tests/boulder-start.sh