diff --git a/util/reserved.json b/util/reserved.json
index 3aec8bc28..2c6b0e48f 100644
--- a/util/reserved.json
+++ b/util/reserved.json
@@ -104,7 +104,9 @@
     "system",
     "team",
     "test",
+    "tools",
     "url",
+    "util",
     "web",
     "webmail",
     "website",