diff --git a/.travis.yml b/.travis.yml
index cf12b91..462e4d5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ matrix:
       env: GCC_VER=4.9
 
 cache:
+  apt: true
   directories:
     - $HOME/.ccache
 
@@ -23,9 +24,6 @@ addons:
     - build-essential
     - ccache
     - cmake
-    - gcc-4.9
-    - libc6-i386
-    - python-empy
 
 before_install:
   - if [ "${TRAVIS_OS_NAME}" = "linux" ]; then
@@ -49,12 +47,6 @@ before_script:
   - ln -s /usr/bin/ccache ~/bin/arm-none-eabi-gcc
   - ln -s /usr/bin/ccache ~/bin/arm-none-eabi-size
   - ln -s /usr/bin/ccache ~/bin/arm-none-eabi-objcopy
-  - ln -s /usr/bin/ccache ~/bin/clang++
-  - ln -s /usr/bin/ccache ~/bin/clang++-3.4
-  - ln -s /usr/bin/ccache ~/bin/clang++-3.5
-  - ln -s /usr/bin/ccache ~/bin/clang
-  - ln -s /usr/bin/ccache ~/bin/clang-3.4
-  - ln -s /usr/bin/ccache ~/bin/clang-3.5
   - export PATH=~/bin:$PATH