diff --git a/.travis.yml b/.travis.yml
index 934aa0b..94629ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: python
 sudo: required
+group: deprecated-2017Q4
 before_script:
   - sudo add-apt-repository ppa:chris-lea/libsodium -y
   - sudo apt-get -qq update