diff --git a/.travis.yml b/.travis.yml
index 1fae56019..be7e68ad6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,13 @@ language: csharp
 dist: trusty
 sudo: required
 mono: none
-before_install:
-    - sudo apt-get install dotnet-sdk-2.0.2
+addons:
+  apt:
+    sources:
+    - sourceline: 'deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ trusty main'
+      key_url: 'https://apt-mo.trafficmanager.net/keys/microsoft.asc'
+    packages:
+    - dotnet-sdk-2.0.2
 branches:
   only:
   - master