diff --git a/.eslintrc.json b/.eslintrc.json
index 6aa5dcd..adea023 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -33,7 +33,8 @@
             "off"
         ],
         "no-unused-vars": [
-            "warn"
+            "warn",
+            { "argsIgnorePattern": "^_" }
         ]
     }
 }
diff --git a/src/index.ts b/src/index.ts
index c35abda..5d868f1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,4 @@
-import $ from "jquery";
+import jQuery from "jquery";
 
 // Helpers
 
@@ -113,7 +113,7 @@ class Typer {
   }
 }
 
-$(document).ready(() => {
-  let typer = new Typer($(".head-line .typed").get(0), 500, 3000);
+jQuery(($) => {
+  const typer = new Typer($(".head-line .typed").get(0), 500, 3000);
   typer.type();
 });
diff --git a/src/lib/js/main.ts b/src/lib/js/main.ts
index 0481cef..a9894f5 100644
--- a/src/lib/js/main.ts
+++ b/src/lib/js/main.ts
@@ -1,3 +1,3 @@
-import $ from "jquery";
+import jQuery from "jquery";
 
-$(document).ready(() => $("html").removeClass("no-js"));
+jQuery(($) => $("html").removeClass("no-js"));
diff --git a/src/music/MusicPlayer.tsx b/src/music/MusicPlayer.tsx
index 22cb10d..a3c5f31 100644
--- a/src/music/MusicPlayer.tsx
+++ b/src/music/MusicPlayer.tsx
@@ -18,16 +18,16 @@ type MusicPlayerProps = {
   source?: string;
 };
 
-class MusicPlayer extends React.Component<MusicPlayerProps, {}> {
+class MusicPlayer extends React.Component<MusicPlayerProps, State> {
   private audioState: AudioState;
 
   constructor(props: MusicPlayerProps) {
     super(props);
 
-    let context = new AudioContext();
-    let source = new Audio();
-    let sourceNode = context.createMediaElementSource(source);
-    let volume = context.createGain();
+    const context = new AudioContext();
+    const source = new Audio();
+    const sourceNode = context.createMediaElementSource(source);
+    const volume = context.createGain();
 
     sourceNode.connect(volume);
     volume.connect(context.destination);
@@ -53,9 +53,9 @@ class MusicPlayer extends React.Component<MusicPlayerProps, {}> {
   }
 
   componentDidUpdate() {
-    let context = this.audioState.audioContext;
-    let source = this.audioState.audioSource;
-    let volume = this.audioState.audioVolume;
+    const context = this.audioState.audioContext;
+    const source = this.audioState.audioSource;
+    const volume = this.audioState.audioVolume;
 
     // First, set the audio source (if it changed)
     if (this.props.source && source.src != this.props.source) {
diff --git a/src/music/components/controls.tsx b/src/music/components/controls.tsx
index 7aa35b6..851cce1 100644
--- a/src/music/components/controls.tsx
+++ b/src/music/components/controls.tsx
@@ -1,16 +1,15 @@
 import React from "react";
-import Redux from "redux";
 import { connect } from "react-redux";
 
 import { State } from "../store";
-import { Title, togglePlay } from "../store/music/types";
+import { Title } from "../store/music/types";
 import Indicator from "./indicator";
 
 type ControlProps = {
   title: Title;
 };
 
-class Controls extends React.Component<ControlProps, {}> {
+class Controls extends React.Component<ControlProps, State> {
   render() {
     return (
       <div id="playerControls" className="container-fluid fixed-bottom">
diff --git a/src/music/components/indicator.tsx b/src/music/components/indicator.tsx
index 544d221..b033f4f 100644
--- a/src/music/components/indicator.tsx
+++ b/src/music/components/indicator.tsx
@@ -2,8 +2,8 @@ import React from "react";
 import { connect } from "react-redux";
 import classNames from "classnames";
 
-import { State } from "../store";
-import { MusicState, togglePlay } from "../store/music/types";
+import { Dispatch, State } from "../store";
+import { togglePlay } from "../store/music/types";
 
 type IndicatorProps = {
   muted: boolean;
@@ -16,13 +16,13 @@ type IndicatorDispatch = {
 
 type Props = IndicatorProps & IndicatorDispatch;
 
-class Indicator extends React.Component<Props, {}> {
+class Indicator extends React.Component<Props, State> {
   click() {
     this.props.play();
   }
 
   render() {
-    let classes = classNames({
+    const classes = classNames({
       btn: true,
       "col-auto": true,
       fas: true,
@@ -49,7 +49,7 @@ function mapStateToProps(state: State): IndicatorProps {
   };
 }
 
-function mapDispatchToProps(dispatch: Redux.Dispatch<any>): IndicatorDispatch {
+function mapDispatchToProps(dispatch: Dispatch): IndicatorDispatch {
   return {
     play: () => {
       dispatch(togglePlay());
diff --git a/src/music/components/visualizer.tsx b/src/music/components/visualizer.tsx
index ebb7bfe..53dfdf3 100644
--- a/src/music/components/visualizer.tsx
+++ b/src/music/components/visualizer.tsx
@@ -1,6 +1,8 @@
 import React from "react";
 import * as three from "three";
 
+import { State } from "../store";
+
 type VisualizerProps = {
   audioContext: AudioContext;
   audioSource: AudioNode;
@@ -13,8 +15,8 @@ class CanvasDrawer {
   private analyserData: Float32Array;
 
   private boxes: Array<three.Mesh>;
-  private camera: three.Camera;
-  private renderer: three.Renderer;
+  private camera: three.PerspectiveCamera;
+  private renderer: three.WebGLRenderer;
   private scene: three.Scene;
 
   private angle: number;
@@ -34,13 +36,13 @@ class CanvasDrawer {
 
     // Make a bunch of boxes to represent the bars
     this.boxes = Array(analyser.frequencyBinCount);
-    let width = 2 / analyser.frequencyBinCount;
+    const width = 2 / analyser.frequencyBinCount;
     for (let freq = 0; freq < analyser.frequencyBinCount; freq++) {
-      let geometry = new three.BoxGeometry(1, 1, 1);
-      let material = new three.MeshLambertMaterial({
+      const geometry = new three.BoxGeometry(1, 1, 1);
+      const material = new three.MeshLambertMaterial({
         color: new three.Color(0x99d1ce),
       });
-      let cube = new three.Mesh(geometry, material);
+      const cube = new three.Mesh(geometry, material);
 
       cube.scale.set(width, 1e-6, width);
       cube.position.set(-1 + freq * width, 0, 0);
@@ -50,10 +52,10 @@ class CanvasDrawer {
     }
 
     // Add lights for shadowing
-    let ambientLight = new three.AmbientLight(0xffffff, 0.4);
+    const ambientLight = new three.AmbientLight(0xffffff, 0.4);
     this.scene.add(ambientLight);
 
-    let directionalLight = new three.DirectionalLight(0xffffff, 1);
+    const directionalLight = new three.DirectionalLight(0xffffff, 1);
     directionalLight.position.set(-1, 0.3, -1);
     directionalLight.castShadow = true;
     this.scene.add(directionalLight);
@@ -94,12 +96,12 @@ class CanvasDrawer {
     // Set our animation frame to 0, so that if we stop, we don't try to cancel a past animation frame
     this.animationFrame = 0;
     // Update elapsed time
-    let elapsed = time - this.lastTime;
+    const elapsed = time - this.lastTime;
     this.lastTime = time;
 
-    let camera = this.camera;
-    let renderer = this.renderer;
-    let scene = this.scene;
+    const camera = this.camera;
+    const renderer = this.renderer;
+    const scene = this.scene;
 
     this.scaleBoxes();
     this.rotateCamera(elapsed);
@@ -109,7 +111,7 @@ class CanvasDrawer {
   }
 
   scaleBoxes() {
-    let analyser = this.analyser;
+    const analyser = this.analyser;
 
     analyser.getFloatFrequencyData(this.analyserData);
 
@@ -133,8 +135,8 @@ class CanvasDrawer {
       this.angle += 0.1 * (elapsed / 1000);
     }
 
-    let camera = this.camera;
-    let angle = this.angle;
+    const camera = this.camera;
+    const angle = this.angle;
 
     camera.position.x = 1.01 * Math.sin(angle);
     camera.position.z = 1.01 * Math.cos(angle);
@@ -144,7 +146,7 @@ class CanvasDrawer {
   }
 
   resize() {
-    let canvas = this.canvas;
+    const canvas = this.canvas;
     if (canvas.parentElement === null) {
       throw Error("Could not access canvas parent for size calculation");
     }
@@ -160,7 +162,7 @@ class CanvasDrawer {
     }
 
     // The remaining space we want to fill
-    let remainingHeight = canvas.parentElement.clientHeight - combinedHeight;
+    const remainingHeight = canvas.parentElement.clientHeight - combinedHeight;
     canvas.height = remainingHeight;
     canvas.width = canvas.parentElement.clientWidth;
 
@@ -176,7 +178,7 @@ class CanvasDrawer {
   }
 }
 
-class Visualizer extends React.Component<VisualizerProps, {}> {
+class Visualizer extends React.Component<VisualizerProps, State> {
   private analyser: AnalyserNode;
   private canvas: React.RefObject<HTMLCanvasElement>;
   private drawer: CanvasDrawer;
@@ -186,7 +188,7 @@ class Visualizer extends React.Component<VisualizerProps, {}> {
     this.canvas = React.createRef();
   }
 
-  render() {
+  render(): React.ReactNode {
     return (
       <canvas
         id="visualizer"
@@ -196,7 +198,7 @@ class Visualizer extends React.Component<VisualizerProps, {}> {
     );
   }
 
-  componentDidMount() {
+  componentDidMount(): void {
     if (this.canvas.current === null) {
       throw Error("Failed to create canvas; aborting");
     }
@@ -209,7 +211,7 @@ class Visualizer extends React.Component<VisualizerProps, {}> {
     this.drawer = new CanvasDrawer(this.analyser, this.canvas.current);
   }
 
-  componentWillUnmount() {
+  componentWillUnmount(): void {
     this.drawer.stop();
     this.props.audioSource.disconnect(this.analyser);
   }
diff --git a/src/music/index.tsx b/src/music/index.tsx
index a5c2917..bc31bdd 100644
--- a/src/music/index.tsx
+++ b/src/music/index.tsx
@@ -5,6 +5,7 @@ import { Provider } from "react-redux";
 import { store } from "./store";
 import MusicPlayer from "./MusicPlayer";
 import { setSource, setTitle } from "./store/music/types";
+// @ts-ignore - mp3 files have no types.
 import mseq from "./Mseq_-_Journey.mp3";
 
 const rootElement = document.getElementById("playerUI");
diff --git a/src/music/store/index.ts b/src/music/store/index.ts
index f523735..8b2344d 100644
--- a/src/music/store/index.ts
+++ b/src/music/store/index.ts
@@ -13,5 +13,8 @@ const rootReducer = combineReducers<State>({
 
 export const store = createStore(
   rootReducer,
+  // @ts-ignore - These properties are set by the devtools extension
   window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__()
 );
+
+export type Dispatch = typeof store.dispatch;
diff --git a/src/music/store/music/types.ts b/src/music/store/music/types.ts
index 39555fc..3ddc95e 100644
--- a/src/music/store/music/types.ts
+++ b/src/music/store/music/types.ts
@@ -18,11 +18,11 @@ export interface MusicState {
   source?: string;
 }
 
-export const setTitle: (title: Title) => Action<null, null> = createAction(
+export const setTitle: (_title: Title) => Action<null, null> = createAction(
   "set currently playing title"
 );
 
-export const setPlayTime: (time: number) => Action<null, null> = createAction(
+export const setPlayTime: (_time: number) => Action<null, null> = createAction(
   "set the play time"
 );
 
@@ -30,6 +30,6 @@ export const toggleMute: () => Action<null, null> = createAction("toggle mute");
 
 export const togglePlay: () => Action<null, null> = createAction("toggle play");
 
-export const setSource: (source: string) => Action<null, null> = createAction(
+export const setSource: (_source: string) => Action<null, null> = createAction(
   "set the title"
 );