diff --git a/scripts/dns-update.nse b/scripts/dns-update.nse
index 6995bdf35..f39995ee2 100644
--- a/scripts/dns-update.nse
+++ b/scripts/dns-update.nse
@@ -10,7 +10,7 @@ Attempts to perform a dynamic DNS update without authentication.
 
 author = "Patrik Karlsson"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
-categories = {"discovery", "safe"}
+categories = {"vuln", "intrusive"}
 
 ---
 -- @usage
diff --git a/scripts/script.db b/scripts/script.db
index cf9f0e673..a5b8e5459 100644
--- a/scripts/script.db
+++ b/scripts/script.db
@@ -90,7 +90,7 @@ Entry { filename = "dns-random-txid.nse", categories = { "external", "intrusive"
 Entry { filename = "dns-recursion.nse", categories = { "default", "safe", } }
 Entry { filename = "dns-service-discovery.nse", categories = { "default", "discovery", "safe", } }
 Entry { filename = "dns-srv-enum.nse", categories = { "discovery", "safe", } }
-Entry { filename = "dns-update.nse", categories = { "discovery", "safe", } }
+Entry { filename = "dns-update.nse", categories = { "intrusive", "vuln", } }
 Entry { filename = "dns-zeustracker.nse", categories = { "discovery", "external", "malware", "safe", } }
 Entry { filename = "dns-zone-transfer.nse", categories = { "discovery", "intrusive", } }
 Entry { filename = "domcon-brute.nse", categories = { "brute", "intrusive", } }