diff --git a/.travis.yml b/.travis.yml
index 77c0ba9ef..34b25d298 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,13 +24,16 @@ cache:
 addons:
   apt:
     sources:
-    - ubuntu-toolchain-r-test
     - boost-latest
     packages:
-    - g++-4.9
     - libboost1.55-all-dev
     - libboost1.55-tools-dev
     - python2.7-dev
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - g++-4.9
 
 before_install:
   - git submodule update --init --recursive