diff --git a/util/reserved.json b/util/reserved.json
index f1e96ff9e..136dfcd8f 100644
--- a/util/reserved.json
+++ b/util/reserved.json
@@ -31,6 +31,8 @@
     "cname",
     "cname[1-99]",
     "co",
+    "codeofconduct",
+    "code-of-conduct",
     "com",
     "com[1-9]",
     "con",