diff --git a/.travis.yml b/.travis.yml
index 41ade42..0721263 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,15 +22,14 @@ matrix:
     - os: linux
       dist: trusty
       sudo: required
-      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-25-a
+      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a
     - os: osx
       osx_image: xcode8.3
       sudo: required
-# Commenting out for now because Travis does not support Xcode 9 beta
-#    - os: osx
-#      osx_image: xcode8.3
-#      sudo: required
-#      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-25-a
+    - os: osx
+      osx_image: xcode9
+      sudo: required
+      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a
 
 before_install:
     - git clone https://github.com/IBM-Swift/Package-Builder.git