diff --git a/src/cronjob/downvoteSegmentArchiveJob.ts b/src/cronjob/downvoteSegmentArchiveJob.ts
index 5ff2282..aba645f 100644
--- a/src/cronjob/downvoteSegmentArchiveJob.ts
+++ b/src/cronjob/downvoteSegmentArchiveJob.ts
@@ -3,7 +3,6 @@ import { CronJob } from "cron";
 import { config as serverConfig } from "../config";
 import { Logger } from "../utils/logger";
 import { db } from "../databases/databases";
-import { DBSegment } from "../types/segments.model";
 
 const jobConfig = serverConfig?.crons?.downvoteSegmentArchive;
 
@@ -14,18 +13,18 @@ export const archiveDownvoteSegment = async (dayLimit: number, voteLimit: number
     Logger.info(`DownvoteSegmentArchiveJob starts at ${timeNow}`);
     try {
     // insert into archive sponsorTime
-    await db.prepare(
-        "run",
-        `INSERT INTO "archivedSponsorTimes" 
-        SELECT * 
-        FROM "sponsorTimes" 
-        WHERE "votes" < ? AND (? - "timeSubmitted") > ?`,
-        [
-            voteLimit,
-            timeNow,
-            threshold
-        ]
-    ) as DBSegment[];
+        await db.prepare(
+            "run",
+            `INSERT INTO "archivedSponsorTimes" 
+             SELECT * 
+             FROM "sponsorTimes" 
+             WHERE "votes" < ? AND (? - "timeSubmitted") > ?`,
+            [
+                voteLimit,
+                timeNow,
+                threshold
+            ]
+        );
 
     } catch (err) {
         Logger.error("Execption when insert segment in archivedSponsorTimes");
@@ -35,15 +34,15 @@ export const archiveDownvoteSegment = async (dayLimit: number, voteLimit: number
 
     // remove from sponsorTime
     try {
-    await db.prepare(
-        "run",
-        'DELETE FROM "sponsorTimes" WHERE "votes" < ? AND (? - "timeSubmitted") > ?',
-        [
-            voteLimit,
-            timeNow,
-            threshold
-        ]
-    ) as DBSegment[];
+        await db.prepare(
+            "run",
+            'DELETE FROM "sponsorTimes" WHERE "votes" < ? AND (? - "timeSubmitted") > ?',
+            [
+                voteLimit,
+                timeNow,
+                threshold
+            ]
+        );
 
     } catch (err) {
         Logger.error("Execption when deleting segment in sponsorTimes");
diff --git a/src/databases/IDatabase.ts b/src/databases/IDatabase.ts
index 5aaceda..6072916 100644
--- a/src/databases/IDatabase.ts
+++ b/src/databases/IDatabase.ts
@@ -6,11 +6,14 @@ export interface QueryOption {
 export interface IDatabase {
     init(): Promise<void>;
 
-    prepare(type: QueryType, query: string, params?: any[], options?: QueryOption): Promise<any | any[] | void>;
+    prepare(type: "run", query: string, params?: any[], options?: QueryOption): Promise<void>;
+    prepare(type: "get", query: string, params?: any[], options?: QueryOption): Promise<any>;
+    prepare(type: "all", query: string, params?: any[], options?: QueryOption): Promise<any[]>;
+    prepare(type: QueryType, query: string, params?: any[], options?: QueryOption): Promise<any>;
 
     highLoad(): boolean;
 
     shouldUseRedisTimeout(): boolean;
 }
 
-export type QueryType = "get" | "all" | "run";
\ No newline at end of file
+export type QueryType = "get" | "all" | "run";
diff --git a/src/databases/Postgres.ts b/src/databases/Postgres.ts
index b6409c2..df1a279 100644
--- a/src/databases/Postgres.ts
+++ b/src/databases/Postgres.ts
@@ -109,7 +109,7 @@ export class Postgres implements IDatabase {
         }
     }
 
-    async prepare(type: QueryType, query: string, params?: any[], options: QueryOption = {}): Promise<any[]> {
+    async prepare(type: QueryType, query: string, params?: any[], options: QueryOption = {}): Promise<any> {
         // Convert query to use numbered parameters
         let count = 1;
         for (let char = 0; char < query.length; char++) {
diff --git a/src/databases/Sqlite.ts b/src/databases/Sqlite.ts
index a178f1f..4e97787 100644
--- a/src/databases/Sqlite.ts
+++ b/src/databases/Sqlite.ts
@@ -13,7 +13,7 @@ export class Sqlite implements IDatabase {
     }
 
     // eslint-disable-next-line require-await
-    async prepare(type: QueryType, query: string, params: any[] = []): Promise<any[]> {
+    async prepare(type: QueryType, query: string, params: any[] = []): Promise<any> {
         // Logger.debug(`prepare (sqlite): type: ${type}, query: ${query}, params: ${params}`);
         const preparedQuery = this.db.prepare(Sqlite.processQuery(query));
 
diff --git a/src/routes/setUsername.ts b/src/routes/setUsername.ts
index 975c082..a0c6e10 100644
--- a/src/routes/setUsername.ts
+++ b/src/routes/setUsername.ts
@@ -7,7 +7,7 @@ import { isUserBanned } from "../utils/checkBan";
 import { HashedUserID } from "../types/user.model";
 import { isRequestInvalid } from "../utils/requestValidator";
 
-function logUserNameChange(userID: string, newUserName: string, oldUserName: string, updatedByAdmin: boolean): Promise<Response>  {
+function logUserNameChange(userID: string, newUserName: string, oldUserName: string, updatedByAdmin: boolean): Promise<void>  {
     return privateDB.prepare("run",
         `INSERT INTO "userNameLogs"("userID", "newUserName", "oldUserName", "updatedByAdmin", "updatedAt") VALUES(?, ?, ?, ?, ?)`,
         [userID, newUserName, oldUserName, + updatedByAdmin, new Date().getTime()]