diff --git a/index.d.ts b/index.d.ts
new file mode 100644
index 0000000..f29824a
--- /dev/null
+++ b/index.d.ts
@@ -0,0 +1,115 @@
+declare module "gamepad.js" {
+  class GamepadListener {
+    constructor(options?: GamepadOptions);
+    start: () => void;
+    stop: () => void;
+    update: () => void;
+    discover: (gamepad: Gamepad, index: number) => void;
+    registerHandler: (index: number, gamepad: Gamepad) => void;
+    removeGamepad: (index: number) => void;
+    onAxis: (event: GamepadAxisEvent) => void;
+    onButton: (event: GamepadButtonEvent) => void;
+    public on(
+      event: "gamepad:connected",
+      handler: (e: GamepadConnectEvent) => void
+    ): void;
+    public on(
+      event: "gamepad:disconnected",
+      handler: (e: GamepadDisconnectEvent) => void
+    ): void;
+    public on(
+      event:
+        | "gamepad:button"
+        | `gamepad:${number}:button`
+        | `gamepad:${number}:button:${number}`,
+      handler: (e: GamepadButtonEvent) => void
+    ): void;
+    public on(
+      event:
+        | "gamepad:axis"
+        | `gamepad:${number}:axis`
+        | `gamepad:${number}:axis:${number}`,
+      handler: (e: GamepadAxisEvent) => void
+    ): void;
+    public off(
+      event: "gamepad:connected",
+      handler: (e: GamepadConnectEvent) => void
+    ): void;
+    public off(
+      event: "gamepad:disconnected",
+      handler: (e: GamepadDisconnectEvent) => void
+    ): void;
+    public off(
+      event:
+        | "gamepad:button"
+        | `gamepad:${number}:button`
+        | `gamepad:${number}:button:${number}`,
+      handler: (e: GamepadButtonEvent) => void
+    ): void;
+    public off(
+      event:
+        | "gamepad:axis"
+        | `gamepad:${number}:axis`
+        | `gamepad:${number}:axis:${number}`,
+      handler: (e: GamepadAxisEvent) => void
+    ): void;
+  }
+
+  class GamepadHandler {
+    constructor(index: number, gamepad: Gamepad, options?: GamepadOptions);
+    update: (gamepad: Gamepad) => void;
+    updateStick: (
+      gamepad: Gamepad,
+      stick: number,
+      axis: number,
+      value: number
+    ) => void;
+    updateButton: (
+      gamepad: Gamepad,
+      button: GamepadButton,
+      index: number
+    ) => void;
+  }
+
+  interface GamepadOptions {
+    analog: boolean;
+    precision: number;
+    deadZone: number;
+    button: {
+      analog: boolean;
+    };
+    stick: {
+      analog: boolean;
+      precision: number;
+      deadZone: number;
+    };
+  }
+
+  interface GamepadAxisEvent {
+    detail: {
+      index: number;
+      value: number;
+      stick: number;
+      axis: number;
+      gamepad: Gamepad;
+    };
+  }
+
+  interface GamepadButtonEvent {
+    detail: {
+      index: number;
+      value: number;
+      pressed: boolean;
+      button: number;
+      gamepad: Gamepad;
+    };
+  }
+
+  interface GamepadConnectEvent {
+    detail: { index: number; gamepad: Gamepad };
+  }
+
+  interface GamepadDisconnectEvent {
+    detail: { index: number };
+  }
+}