Update .travis.yml

ikesyo · ikesyo · commit f70f681bc3ec · 2016-03-31T13:53:32.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,7 +9,7 @@ notifications:
     secure: Nh1mbn1RzYrI5tIY52gNrMy+PX1hdq2rIAJHxJjeiWjQDYfIoynhQ/2NIKs6Y0b0E5GIQEtF1fereyWdxcoEFGloY3cq4HZ7dgqr9kzOHrlDMp80fWbcoTqrgbOsKreFFtrv413d5+YcNkJvkYRfnxbuWLPZPszrcbw82TyRL60=
 before_deploy:
   - brew update
-  - brew install carthage
+  - brew outdated carthage || brew upgrade carthage
   - carthage build --no-skip-current
   - carthage archive ReactiveTask
 deploy:
