diff --git a/lib/utils/reserved-users.js b/lib/utils/reserved-users.js
--- a/lib/utils/reserved-users.js
+++ b/lib/utils/reserved-users.js
@@ -1,8 +1,9 @@
 // @flow
 
+// All entries in this list must be lowercase!!
 const reservedUsernamesSet: $ReadOnlySet<string> = new Set([
   // Additional Reserved Keywords
-  'Comm',
+  'comm',
   'dapp-tools',
   'dapp_tools',
   'ethers-js',
@@ -10,8 +11,8 @@
   'ganache-cli',
   'ganache_cli',
   'hardhat',
-  'Mod',
-  'Moderator',
+  'mod',
+  'moderator',
   'solidity',
   'truffle',
   'web3',