diff --git a/.travis.yml b/.travis.yml
index 40990dc7..d98abdc7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,12 +9,9 @@ rust:
 
 addons:
   apt:
-    sources:
-      - llvm-toolchain-precise-3.9
     packages:
       - libcfitsio3-dev
       - pkg-config
-      - clang-3.9
 
 matrix:
   allow_failures: