diff --git a/scripts/tls-alpn.nse b/scripts/tls-alpn.nse
index 4dabadf7e..6cffd9c21 100644
--- a/scripts/tls-alpn.nse
+++ b/scripts/tls-alpn.nse
@@ -181,6 +181,7 @@ action = function(host, port)
     "pop3",
     "managesieve",
     "coap",
+    "co", -- COAP over DTLS
     "xmpp-client",
     "xmpp-server",
     "acme-tls/1",
@@ -197,6 +198,9 @@ action = function(host, port)
     "sip/2",
     "tds/8.0",
     "dicom",
+    "postgresql",
+    "radius/1.0",
+    "radius/1.1",
     -- Other sources
     "grpc-exp", -- gRPC, see grpc.io
   }