diff --git a/.travis.yml b/.travis.yml
index cbf8ecf9..c1760a7c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -44,7 +44,8 @@ matrix:
                     - g++-9
                 sources:
                     - ubuntu-toolchain-r-test
-                    - llvm-toolchain-xenial-7
+                    - sourceline: 'deb https://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main'
+                      key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
           name: Linux Clang Debug
 
         - env: COMPILER=clang++-8 BUILD_TYPE=Release