diff --git a/js/src/rive.ts b/js/src/rive.ts
index 90b45447..89ec12e0 100644
--- a/js/src/rive.ts
+++ b/js/src/rive.ts
@@ -222,6 +222,8 @@ export class RuntimeLoader {
   // if embedded wasm is used then this is never used.
   private static wasmURL = `https://unpkg.com/${packageData.name}@${packageData.version}/rive.wasm`;
 
+  private static wasmBinary: ArrayBuffer;
+
   // Class is never instantiated
   private constructor() {}
 
@@ -230,6 +232,7 @@ export class RuntimeLoader {
     rc.default({
       // Loads Wasm bundle
       locateFile: () => RuntimeLoader.wasmURL,
+      wasmBinary: RuntimeLoader.wasmBinary
     })
       .then((rive: rc.RiveCanvas) => {
         RuntimeLoader.runtime = rive;
@@ -315,6 +318,15 @@ export class RuntimeLoader {
   public static getWasmUrl(): string {
     return RuntimeLoader.wasmURL;
   }
+  // Manually sets the wasm binary
+  public static setWasmBinary(ab: ArrayBuffer): void {
+    RuntimeLoader.wasmBinary = ab;
+  }
+
+  // Gets the current wasm url
+  public static getWasmBinary(): ArrayBuffer {
+    return RuntimeLoader.wasmBinary;
+  }
 }
 
 // #endregion
diff --git a/js/src/rive_advanced.mjs.d.ts b/js/src/rive_advanced.mjs.d.ts
index 6ae26014..4d7bb140 100644
--- a/js/src/rive_advanced.mjs.d.ts
+++ b/js/src/rive_advanced.mjs.d.ts
@@ -1,5 +1,6 @@
 interface RiveOptions {
   locateFile(file: string): string;
+  wasmBinary?: ArrayBuffer;
 }
 
 declare function Rive(options?: RiveOptions): Promise<RiveCanvas>;