diff --git a/.travis.yml b/.travis.yml
index d2e5340..adb77c2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -45,13 +45,13 @@ matrix:
         apt:
           sources:
             - ubuntu-toolchain-r-test
-            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-5 main'
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-5.0 main'
               key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
           packages:
             - g++-7
-            - clang-5
+            - clang-5.0
       env:
-        - CXX_COMPILER=clang++-5 CC_COMPILER=clang-5
+        - CXX_COMPILER=clang++-5.0 CC_COMPILER=clang-5.0
 
     - os: linux
       compiler: clang++
@@ -59,13 +59,13 @@ matrix:
         apt:
           sources:
             - ubuntu-toolchain-r-test
-            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-6 main'
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-6.0 main'
               key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
           packages:
             - g++-7
-            - clang-6
+            - clang-6.0
       env:
-        - CXX_COMPILER=clang++-6 CC_COMPILER=clang-6
+        - CXX_COMPILER=clang++-6.0 CC_COMPILER=clang-6.0
 
     - os: linux
       compiler: clang++