diff --git a/Libraries/WebSocket/RCTWebSocketModule.m b/Libraries/WebSocket/RCTWebSocketModule.m
index 6e057f78b148c7..4dac8a99fed57e 100644
--- a/Libraries/WebSocket/RCTWebSocketModule.m
+++ b/Libraries/WebSocket/RCTWebSocketModule.m
@@ -61,6 +61,12 @@ - (void)dealloc
   [_sockets[socketID] send:message];
 }
 
+RCT_EXPORT_METHOD(sendBinary:(NSString *)base64String socketID:(nonnull NSNumber *)socketID)
+{
+  NSData *message = [[NSData alloc] initWithBase64EncodedString:base64String options:0];
+  [_sockets[socketID] send:message];
+}
+
 RCT_EXPORT_METHOD(close:(nonnull NSNumber *)socketID)
 {
   [_sockets[socketID] close];
diff --git a/Libraries/WebSocket/WebSocket.js b/Libraries/WebSocket/WebSocket.js
index ec6f722ef7a8ab..df6afeac0c85d7 100644
--- a/Libraries/WebSocket/WebSocket.js
+++ b/Libraries/WebSocket/WebSocket.js
@@ -53,9 +53,9 @@ class WebSocket extends WebSocketBase {
     RCTWebSocketModule.send(message, this._socketId);
   }
 
-  sendArrayBufferImpl(): void {
-    // TODO
-    console.warn('Sending ArrayBuffers is not yet supported');
+  sendArrayBufferImpl(data: ArrayBuffer): void {
+    var message = base64.fromByteArray(new Uint8Array(data));
+    RCTWebSocketModule.sendBinary(message, this._socketId);
   }
 
   _closeWebSocket(id: number, code?: number, reason?: string): void {
diff --git a/Libraries/WebSocket/WebSocketBase.js b/Libraries/WebSocket/WebSocketBase.js
index 843ae403540c04..162e5ee7125dde 100644
--- a/Libraries/WebSocket/WebSocketBase.js
+++ b/Libraries/WebSocket/WebSocketBase.js
@@ -102,7 +102,7 @@ class WebSocketBase extends EventTarget {
     throw new Error('Subclass must define sendStringImpl method');
   }
 
-  sendArrayBufferImpl(): void {
+  sendArrayBufferImpl(data: ArrayBuffer): void {
     throw new Error('Subclass must define sendArrayBufferImpl method');
   }
 }
diff --git a/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java b/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
index af8d79597884e5..e10a57e29c46de 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/modules/websocket/WebSocketModule.java
@@ -40,6 +40,7 @@
 
 import okio.Buffer;
 import okio.BufferedSource;
+import okio.ByteString;
 
 public class WebSocketModule extends ReactContextBaseJavaModule {
 
@@ -182,6 +183,22 @@ public void send(String message, int id) {
     }
   }
 
+  @ReactMethod
+  public void sendBinary(String message, int id) {
+    WebSocket client = mWebSocketConnections.get(id);
+    if (client == null) {
+      // This is a programmer error
+      throw new RuntimeException("Cannot send a binary message. Unknown WebSocket id" + id);
+    }
+    try {
+      client.sendMessage(
+        WebSocket.PayloadType.BINARY,
+        new Buffer().write(ByteString.decodeBase64(message)));
+    } catch (IOException | IllegalStateException e) {
+      notifyWebSocketFailed(id, e.getMessage());
+    }
+  }
+
   private void notifyWebSocketFailed(int id, String message) {
     WritableMap params = Arguments.createMap();
     params.putInt("id", id);
diff --git a/package.json b/package.json
index be9c68c74edfa4..b1d82e156a0e35 100644
--- a/package.json
+++ b/package.json
@@ -136,7 +136,7 @@
     "babel-register": "^6.6.0",
     "babel-types": "^6.6.4",
     "babylon": "^6.6.4",
-    "base64-js": "^0.0.8",
+    "base64-js": "^1.0.4",
     "bser": "^1.0.2",
     "chalk": "^1.1.1",
     "connect": "^2.8.3",