diff --git a/data/radicale.md b/data/radicale.md
index 2f5ab64..711bc9b 100644
--- a/data/radicale.md
+++ b/data/radicale.md
@@ -1,6 +1,7 @@
 ---
 title: "radicale and nginx"
 tags: [ "data", "calendar" ]
+required: [ "nginx", "certbot" ]
 ---
 
 Check before you start:
diff --git a/data/soft_https.md b/data/soft_https.md
index fcdab9a..077091a 100644
--- a/data/soft_https.md
+++ b/data/soft_https.md
@@ -1,6 +1,7 @@
 ---
 title: "Soft Serve through https"
 tags: [ "data", "git server", "lfs" ]
+required: [ "git", "nginx" ]
 ---
 
 ## `http` Setup