diff --git a/.swift-version b/.swift-version
index 8c50098..bf77d54 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-3.1
+4.2
diff --git a/.travis.yml b/.travis.yml
index c3869e3..7733517 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
-osx_image: xcode9
+osx_image: xcode10
 language: objective-c
 script: xcodebuild clean && xcodebuild build -project SimpleImageViewer.xcodeproj -scheme SimpleImageViewer