diff --git a/.travis.yml b/.travis.yml
index 55a8a78..7ef4a3f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: cpp
 
+sudo: false
 os:
   - linux
 
@@ -21,26 +22,26 @@ before_install:
 
    if [ ${TRAVIS_OS_NAME} = 'linux' ]; 
    then 
-     sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test; 
-     sudo apt-get update -qq;
-     sudo apt-get install python-software-properties;
-     sudo apt-get update;
-     sudo apt-get install gcc-5 g++-5;
-     sudo apt-get install software-properties-common;
+     add-apt-repository -y ppa:ubuntu-toolchain-r/test; 
+     apt-get update -qq;
+     apt-get install python-software-properties;
+     apt-get update;
+     apt-get install gcc-5 g++-5;
+     apt-get install software-properties-common;
     # sudo add-apt-repository -y ppa:george-edison55-precise-backports;
-     sudo apt-get update;
-     sudo apt-get update -qq;
+     apt-get update;
+     apt-get update -qq;
      #sudo apt-get install cmake cmake-data;
    fi
  
 install:
   #  gcc 5 .
-  - if [ "$CXX" == "g++" ]; then sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 10; fi
-  - if [ "$CXX" == "g++" ]; then  sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-5 10; fi
+  - if [ "$CXX" == "g++" ]; then update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 10; fi
+  - if [ "$CXX" == "g++" ]; then  update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-5 10; fi
 
   # clang 3.4
-  - if [ "$CXX" == "clang++" ]; then sudo apt-get install --allow-unauthenticated -qq clang-3.4; fi
-  - if [ "$CXX" == "clang++" ]; then sudo apt-get install libc++1 libc++abi-dev || true; fi
+  - if [ "$CXX" == "clang++" ]; then apt-get install --allow-unauthenticated -qq clang-3.4; fi
+  - if [ "$CXX" == "clang++" ]; then apt-get install libc++1 libc++abi-dev || true; fi
 
   - if [ "$CXX" == "clang++" ]; then export CXXFLAGS="-std=c++0x -stdlib=libc++"; fi
   - if [ "$CXX" == "clang++" ]; then svn co --quiet http://llvm.org/svn/llvm-project/libcxx/trunk libcxx; fi
@@ -61,9 +62,10 @@ script: "./scripts/buildAndRunTests.sh"
  
 addons:
   apt:
-    packages:
-    - cmake
-    - cmake-data
     sources:
     - kalakris-cmake
     - george-edison55-precise-backports
+    packages:
+    - cmake
+    - cmake-data
+