diff --git a/.swift-version b/.swift-version
index 9f55b2c..8c50098 100644
--- a/.swift-version
+++ b/.swift-version
@@ -1 +1 @@
-3.0
+3.1
diff --git a/.travis.yml b/.travis.yml
index 00660c2..4f959be 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode8
+osx_image: xcode8.3
 env:
   - LC_CTYPE=en_US.UTF-8
 git: