diff --git a/.swift-version b/.swift-version
index aa31e71..4d0dcda 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-4.0.3
\ No newline at end of file
+4.1.2
diff --git a/.travis.yml b/.travis.yml
index da22a54..e9493a9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,18 +7,31 @@ branches:
     - develop
     - /^issue.*$/
 
-notifications:
-  slack:
-    secure: "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"
-
 matrix:
   include:
     - os: linux
       dist: trusty
       sudo: required
+      env: SWIFT_SNAPSHOT=4.0.3
+    - os: linux
+      dist: trusty
+      sudo: required
+    - os: linux
+      dist: trusty
+      sudo: required
+      env: SWIFT_SNAPSHOT=swift-4.2-DEVELOPMENT-SNAPSHOT-2018-06-26-a
     - os: osx
       osx_image: xcode9.2
       sudo: required
+      env: SWIFT_SNAPSHOT=4.0.3
+    - os: osx
+      osx_image: xcode9.4
+      sudo: required
+      env: JAZZY_ELIGIBLE=true
+    - os: osx
+      osx_image: xcode9.4
+      sudo: required
+      env: SWIFT_SNAPSHOT=swift-4.2-DEVELOPMENT-SNAPSHOT-2018-06-04-a
 
 before_install:
   - git clone https://github.com/IBM-Swift/Package-Builder.git