diff --git a/src/App.tsx b/src/App.tsx
index af528a1..b22383a 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,6 +1,6 @@
-import { useState } from "react";
+import { useState, MouseEventHandler } from "react";
 
-import { Routes, Route, Navigate } from "react-router-dom";
+import { Routes, Route } from "react-router-dom";
 import { Helmet } from "react-helmet";
 
 import AppBar from "./components/AppBar";
@@ -18,7 +18,7 @@ import "./App.css";
 
 type AppProps = {
   darkMode: boolean;
-  toggleDarkMode: Function;
+  toggleDarkMode: MouseEventHandler<HTMLElement>;
 };
 
 function App(props: AppProps) {
diff --git a/src/lib/paddles.ts b/src/lib/paddles.ts
index d8c1b57..4f5d1e2 100644
--- a/src/lib/paddles.ts
+++ b/src/lib/paddles.ts
@@ -153,7 +153,7 @@ function useStatsNodeLocks(params: GetURLParams): UseQueryResult<StatsLocksRespo
   const query = useQuery(["statsLocks", { url }], {
     select: (data: Node[]) => {
       let users = new Map();
-      data.map((node) => {
+      data.forEach((node) => {
         let owner: string = node["locked"] ? (node["locked_by"] || "-") : "(free)";
         let mtype: string = node["machine_type"] || "None";
         let mtype_dict = users.get(owner) || new Map();
diff --git a/src/lib/teuthologyAPI.ts b/src/lib/teuthologyAPI.ts
index 19b09ba..41f6651 100644
--- a/src/lib/teuthologyAPI.ts
+++ b/src/lib/teuthologyAPI.ts
@@ -47,7 +47,7 @@ function useUserData(): Map<string, string> {
         const cookie_ = cookie.replace(/\\073/g, ';');
         let cookieMap: Map<string, string> = new Map();
         let cookieSegments = cookie_.split(";");
-        cookieSegments.map((cookie: string) => {
+        cookieSegments.forEach((cookie: string) => {
             let [key, value] = cookie.split("=");
             cookieMap.set(key.trim(), value.trim());
         })