diff --git a/scripts/generate-keys.sh b/scripts/generate-keys.sh
index 5330130c2920789a15c2db9d45cd162e710583ef..7148fb18bf0d8b37b654636db7bd87df43d4f162 100755
--- a/scripts/generate-keys.sh
+++ b/scripts/generate-keys.sh
@@ -10,7 +10,7 @@ mkdir -p "$rootdir/public/groups"
 mkdir -p "$rootdir/public/keys"
 
 cat > public/index.html <<EOF
-<html>
+<!doctype html>
 <head>
 <title>Freifunk Stuttgart SSH Keys</title>
 <meta charset="utf-8">