diff --git a/.travis.yml b/.travis.yml
index 46bb326da69..ea9cf505b82 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ services:
 before_install:
   # required when sudo: required for the Ruby petstore tests
   - gem install bundler
+  - npm install -g typescript
 
 install: