diff --git a/.travis.yml b/.travis.yml
index dd26b617..82ad7f62 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -67,11 +67,11 @@ matrix:
 
       # Test clang-7.0: C++11, Build=Debug, ASAN=On
     - env: CLANG_VERSION=7.0 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
-      os: linux   
+      dist: bionic
       addons: *clang70
 
     - env: CLANG_VERSION=7.0 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
-      os: linux
+      dist: bionic
       addons: *clang70
 
       # osx