diff --git a/.travis.yml b/.travis.yml
index f004410..c4601ab 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,12 +3,8 @@ language: bash
 # Use container-based infrastructure for quicker build start-up
 sudo: false
 
-addons:
-  apt:
-    sources:
-    - debian-sid
-    packages:
-    - shellcheck
+before_script:
+    - shellcheck --version
 
 script:
     - shellcheck -e SC2034 duplicity-backup.sh duplicity-backup.conf.example