diff --git a/.forgejo/workflows/build.yml b/.forgejo/workflows/build.yml
index 84fd5a8..087d41b 100644
--- a/.forgejo/workflows/build.yml
+++ b/.forgejo/workflows/build.yml
@@ -82,7 +82,13 @@ jobs:
     strategy:
       matrix:
         k3s:
+          # https://github.com/k3s-io/k3s/branches
+          # oldest supported version
           - v1.28.13+k3s1 # renovate: k3s
+          # https://github.com/k3s-io/k3s/blob/master/channel.yaml#L3-L4
+          # stable version
+          - v1.30.4+k3s1 # renovate: k3s
+          # newest version
           - v1.31.0+k3s1 # renovate: k3s
 
     steps: