diff --git a/.travis.yml b/.travis.yml
index 507b9eb..7901b99 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -35,10 +35,6 @@ addons:
       - clang-3.8
     sources:
       - ubuntu-toolchain-r-test
-      - llvm-toolchain-precise
-      - llvm-toolchain-precise-3.6
-      - llvm-toolchain-precise-3.7
-      - llvm-toolchain-precise-3.8
 
 matrix: