diff --git a/src/types/guacamole-common-js.d.ts b/src/types/guacamole-common-js.d.ts
new file mode 100644
index 00000000..a377e0f9
--- /dev/null
+++ b/src/types/guacamole-common-js.d.ts
@@ -0,0 +1,100 @@
+declare module "guacamole-common-js" {
+  namespace Guacamole {
+    class Client {
+      constructor(tunnel: Tunnel);
+      connect(data?: string): void;
+      disconnect(): void;
+      getDisplay(): Display;
+      sendKeyEvent(pressed: number, keysym: number): void;
+      sendMouseState(state: Mouse.State): void;
+      setClipboard(stream: OutputStream, mimetype: string): void;
+      createClipboardStream(mimetype: string): OutputStream;
+      onstatechange: ((state: number) => void) | null;
+      onerror: ((error: Status) => void) | null;
+      onclipboard: ((stream: InputStream, mimetype: string) => void) | null;
+    }
+
+    class Display {
+      getElement(): HTMLElement;
+      getWidth(): number;
+      getHeight(): number;
+      scale(scale: number): void;
+      onresize: (() => void) | null;
+    }
+
+    class Tunnel {
+      onerror: ((status: Status) => void) | null;
+      onstatechange: ((state: number) => void) | null;
+    }
+
+    class WebSocketTunnel extends Tunnel {
+      constructor(url: string);
+    }
+
+    class Mouse {
+      constructor(element: HTMLElement);
+      onmousedown: ((state: Mouse.State) => void) | null;
+      onmouseup: ((state: Mouse.State) => void) | null;
+      onmousemove: ((state: Mouse.State) => void) | null;
+      onmouseout: ((state: Mouse.State) => void) | null;
+    }
+
+    namespace Mouse {
+      class State {
+        constructor(
+          x: number,
+          y: number,
+          left: boolean,
+          middle: boolean,
+          right: boolean,
+          up: boolean,
+          down: boolean
+        );
+        x: number;
+        y: number;
+        left: boolean;
+        middle: boolean;
+        right: boolean;
+        up: boolean;
+        down: boolean;
+      }
+    }
+
+    class Keyboard {
+      constructor(element: Document | HTMLElement);
+      onkeydown: ((keysym: number) => void) | null;
+      onkeyup: ((keysym: number) => void) | null;
+    }
+
+    class Status {
+      code: number;
+      message: string;
+      isError(): boolean;
+    }
+
+    class InputStream {
+      onblob: ((data: string) => void) | null;
+      onend: (() => void) | null;
+    }
+
+    class OutputStream {
+      sendBlob(data: string): void;
+      sendEnd(): void;
+    }
+
+    class StringReader {
+      constructor(stream: InputStream);
+      ontext: ((text: string) => void) | null;
+      onend: (() => void) | null;
+    }
+
+    class StringWriter {
+      constructor(stream: OutputStream);
+      sendText(text: string): void;
+      sendEnd(): void;
+    }
+  }
+
+  export default Guacamole;
+}
+