diff --git a/.travis.yml b/.travis.yml
index c8f6873..4dae921 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,9 @@ node_js:
   - "node"
 addons:
   apt:
+    sources:
+      - ubuntu-toolchain-r-test  
+      - ppa:ubuntu-toolchain-r/test
     packages:
       - python
       - cmake