diff --git a/.travis.yml b/.travis.yml
index 6ead9b02..8256fc01 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -57,9 +57,33 @@ matrix:
       compiler: clang
       addons:
         apt:
-          sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.7']
-          packages: ['clang-3.7', 'automake', 'autoconf', 'libtool', 'shtool', 'libsqlite3-dev', 'python-sphinx', 'texinfo']
-      env: COMPILER=clang-3.7
+          sources: ['ubuntu-toolchain-r-test']
+          packages: ['clang-3.9', 'llvm-3.9-dev', 'automake', 'autoconf', 'libtool', 'shtool', 'libsqlite3-dev', 'python-sphinx', 'texinfo']
+      env: COMPILER=clang-3.9
+
+    - os: linux
+      compiler: clang
+      addons:
+        apt:
+          sources: ['ubuntu-toolchain-r-test']
+          packages: ['clang-4.0', 'llvm-4.0-dev', 'automake', 'autoconf', 'libtool', 'shtool', 'libsqlite3-dev', 'python-sphinx', 'texinfo']
+      env: COMPILER=clang-4.0
+
+    - os: linux
+      compiler: clang
+      addons:
+        apt:
+          sources: ['ubuntu-toolchain-r-test']
+          packages: ['clang-5.0', 'llvm-5.0-dev', 'automake', 'autoconf', 'libtool', 'shtool', 'libsqlite3-dev', 'python-sphinx', 'texinfo']
+      env: COMPILER=clang-5.0
+
+    - os: linux
+      compiler: clang
+      addons:
+        apt:
+          sources: ['ubuntu-toolchain-r-test']
+          packages: ['clang-6.0', 'llvm-6.0-dev', 'automake', 'autoconf', 'libtool', 'shtool', 'libsqlite3-dev', 'python-sphinx', 'texinfo']
+      env: COMPILER=clang-6.0
 
     - os: osx
       osx_image: xcode7.3