diff --git a/src/controllers/custom/renameAccountController.ts b/src/controllers/custom/renameAccountController.ts
index c5b733e8..d30b44ae 100644
--- a/src/controllers/custom/renameAccountController.ts
+++ b/src/controllers/custom/renameAccountController.ts
@@ -1,5 +1,6 @@
 import { RequestHandler } from "express";
-import { getAccountForRequest, isNameTaken } from "@/src/services/loginService";
+import { getAccountForRequest, isAdministrator, isNameTaken } from "@/src/services/loginService";
+import { config, saveConfig } from "@/src/services/configService";
 
 export const renameAccountController: RequestHandler = async (req, res) => {
     const account = await getAccountForRequest(req);
@@ -7,8 +8,18 @@ export const renameAccountController: RequestHandler = async (req, res) => {
         if (await isNameTaken(req.query.newname)) {
             res.status(409).json("Name already in use");
         } else {
+            if (isAdministrator(account)) {
+                for (let i = 0; i != config.administratorNames!.length; ++i) {
+                    if (config.administratorNames![i] == account.DisplayName) {
+                        config.administratorNames![i] = req.query.newname;
+                    }
+                }
+                await saveConfig();
+            }
+
             account.DisplayName = req.query.newname;
             await account.save();
+
             res.end();
         }
     } else {
diff --git a/src/index.ts b/src/index.ts
index 4f7fc939..f540f96e 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -19,9 +19,13 @@ import mongoose from "mongoose";
         return "<BIGINT>" + this.toString() + "</BIGINT>";
     };
     const og_stringify = JSON.stringify;
-    // eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-member-access
-    (JSON as any).stringify = (obj: any): string => {
-        return og_stringify(obj).split(`"<BIGINT>`).join(``).split(`</BIGINT>"`).join(``);
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    JSON.stringify = (obj: any, replacer?: any, space?: string | number): string => {
+        return og_stringify(obj, replacer as string[], space)
+            .split(`"<BIGINT>`)
+            .join(``)
+            .split(`</BIGINT>"`)
+            .join(``);
     };
 }
 
diff --git a/src/services/configService.ts b/src/services/configService.ts
index 66c50dda..114eccc9 100644
--- a/src/services/configService.ts
+++ b/src/services/configService.ts
@@ -34,7 +34,7 @@ interface IConfig {
     httpsPort?: number;
     myIrcAddresses?: string[];
     NRS?: string[];
-    administratorNames?: string[] | string;
+    administratorNames?: string[];
     autoCreateAccount?: boolean;
     skipTutorial?: boolean;
     skipAllDialogue?: boolean;
@@ -83,10 +83,15 @@ export const updateConfig = async (data: string): Promise<void> => {
     Object.assign(config, JSON.parse(data));
 };
 
+export const saveConfig = async (): Promise<void> => {
+    amnesia = true;
+    await fsPromises.writeFile(configPath, JSON.stringify(config, null, 2));
+};
+
 export const validateConfig = (): void => {
     if (typeof config.administratorNames == "string") {
-        logger.warn(
-            `"administratorNames" should be an array; please add square brackets: ["${config.administratorNames}"]`
-        );
+        logger.info(`Updating config.json to make administratorNames an array.`);
+        config.administratorNames = [config.administratorNames];
+        void saveConfig();
     }
 };
diff --git a/src/services/loginService.ts b/src/services/loginService.ts
index 6509d8be..c69e891d 100644
--- a/src/services/loginService.ts
+++ b/src/services/loginService.ts
@@ -93,13 +93,7 @@ export const getAccountIdForRequest = async (req: Request): Promise<string> => {
 };
 
 export const isAdministrator = (account: TAccountDocument): boolean => {
-    if (!config.administratorNames) {
-        return false;
-    }
-    if (typeof config.administratorNames == "string") {
-        return config.administratorNames == account.DisplayName;
-    }
-    return !!config.administratorNames.find(x => x == account.DisplayName);
+    return !!config.administratorNames?.find(x => x == account.DisplayName);
 };
 
 const platform_magics = [753, 639, 247, 37, 60];