diff --git a/.travis.yml b/.travis.yml
index 8c03ec0..34f0460 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,10 @@
 language: python
+sudo: false
 matrix:
   include:
     - python: "2.7"
-      sudo: false
     - python: "3.5"
-      sudo: false
     - python: "3.6"
-      sudo: false
     - python: "3.7"
       dist: xenial
       sudo: true
diff --git a/buildout.cfg b/buildout.cfg
index d4329dd..bc1aded 100644
--- a/buildout.cfg
+++ b/buildout.cfg
@@ -1,6 +1,6 @@
 [buildout]
 extends =
-    https://raw.githubusercontent.com/zopefoundation/Zope/master/versions.cfg
+    https://zopefoundation.github.io/Zope/releases/4.0b6/versions-prod.cfg
 
 develop = .
 parts = test