diff --git a/readme.md b/readme.md
index ddef9bd..498a424 100644
--- a/readme.md
+++ b/readme.md
@@ -9,8 +9,9 @@ from various CA, CI, OCI / OS.
     * [ ] package repositories mirror
       * [ ] custom CA certificates
       * [X] known CA certificates
-    * [X] Operating Systems
+    * [ ] Operating Systems
       * [X] Debian
+      * [ ] Alpine
       * [X] Alma
     * [X] Continuous Integration platforms
       * [X] GitHub → Gitea → ForgeJo