diff --git a/.travis.yml b/.travis.yml
index d3e2e27..4121051 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,9 +15,10 @@ branches:
     - themify
 
 before_install:
- - sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu bionic-backports bullseye main restricted universe multiverse"
+ - sudo add-apt-repository -qq -y "deb http://archive.ubuntu.com/ubuntu bionic-backports bionic-proposed restricted main multiverse universe"
  - sudo apt-get update -qq -y
- - sudo apt-get install -y nano_4.6
+ - sudo apt-get install -y nano=4.5
+ - sudo apt-get install -y shellcheck=0.6
  - nano --version
  - shellcheck --version