diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9bf7ed1..0b12cfec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,3 +1,5 @@
+# Based on https://github.com/aptly-dev/aptly/blob/master/.travis.yml
+
 name: CI
 
 on: