diff --git a/.travis.yml b/.travis.yml
index 8881819da..1398c70d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ matrix:
           env:
             - CC=gcc ASANLIB=libasan.so.0 ASAN_ARG=--asan
           language: python
+          python: "3.5"
           addons:
             apt:
               packages:
@@ -25,6 +26,7 @@ matrix:
             - CC=clang
             - RUN_FLAKE=1
           language: python
+          python: "3.5"
           addons:
             apt:
               packages: