diff --git a/drone/PKGBUILD b/drone/PKGBUILD
index fa08dcd..1f58404 100644
--- a/drone/PKGBUILD
+++ b/drone/PKGBUILD
@@ -8,6 +8,7 @@ pkgdesc="Continuous Delivery platform built on container technology"
 arch=('x86_64')
 url="https://drone.io"
 license=('custom:Drone-Non-Commercial')
+# ref: https://discourse.drone.io/t/exec-runner-404-error-on-ping/7922
 makedepends=('go' 'git')
 source=(
   "$pkgname-$pkgver.tar.gz::https://github.com/drone/drone/archive/v$pkgver.tar.gz"