diff --git a/.gitignore b/.gitignore
index e41dfce..6521fb3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 /.build
 /Packages
 /*.xcodeproj
+Package.resolved
diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index e69de29..0000000
diff --git a/.travis.yml b/.travis.yml
index 2ad6666..037c845 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,22 +13,22 @@ matrix:
     - os: linux
       dist: trusty
       sudo: required
-      services: docker
-      env: DOCKER_IMAGE=ubuntu:16.04 SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-11-a
     - os: linux
       dist: trusty
       sudo: required
+      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a
     - os: linux
       dist: trusty
       sudo: required
-      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-11-a
+      services: docker
+      env: DOCKER_IMAGE=ubuntu:16.04 SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a
     - os: osx
       osx_image: xcode8.3
       sudo: required
     - os: osx
-      osx_image: xcode8.3
+      osx_image: xcode9
       sudo: required
-      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-11-a
+      env: SWIFT_SNAPSHOT=4.0-DEVELOPMENT-SNAPSHOT-2017-06-29-a
 
 script:
   - ./build.sh