diff --git a/.travis.yml b/.travis.yml
index c338c4a4..f3efc0d7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,8 @@ addons:
     - re2c
     - gcc-5
     - g++-5
+    sources:
+    - ubuntu-toolchain-r-test
   coverity_scan:
     project:
       name: "tstack/lnav"