diff --git a/src/main/java/org/thoughtcrime/securesms/WebxdcActivity.java b/src/main/java/org/thoughtcrime/securesms/WebxdcActivity.java
index 4012378d7..b126d0c10 100644
--- a/src/main/java/org/thoughtcrime/securesms/WebxdcActivity.java
+++ b/src/main/java/org/thoughtcrime/securesms/WebxdcActivity.java
@@ -365,8 +365,11 @@ public class WebxdcActivity extends WebViewActivity implements DcEventCenter.DcE
       callJavaScriptFunction("__webxdcUpdate()");
     } else if ((eventId == DcContext.DC_EVENT_WEBXDC_REALTIME_DATA && event.getData1Int() == dcAppMsg.getId())) {
       Log.i(TAG, "handling realtime data event");
-      String base64 = Base64.encodeToString(event.getData2Blob(), Base64.NO_WRAP | Base64.NO_PADDING);
-      callJavaScriptFunction("__webxdcRealtimeData(\"" + base64 + "\")");
+      StringBuilder data = new StringBuilder();
+      for (byte b : event.getData2Blob()) {
+          data.append(((int) b)  + ",");
+      }
+      callJavaScriptFunction("__webxdcRealtimeData([" + data + "])");
     } else if ((eventId == DcContext.DC_EVENT_MSGS_CHANGED && event.getData2Int() == dcAppMsg.getId())) {
       this.dcAppMsg = this.dcContext.getMsg(event.getData2Int()); // msg changed, reload data from db
       Util.runOnAnyBackgroundThread(() -> {
diff --git a/src/main/res/raw/webxdc.js b/src/main/res/raw/webxdc.js
index bc34960e9..9d23bdbf5 100644
--- a/src/main/res/raw/webxdc.js
+++ b/src/main/res/raw/webxdc.js
@@ -16,10 +16,9 @@ window.webxdc = (() => {
     }
   };
 
-  window.__webxdcRealtimeData = (base64Data) => {
+  window.__webxdcRealtimeData = (intArray) => {
     if (realtimeChannel) {
-      const data = Uint8Array.from(atob(base64Data), (m) => m.codePointAt(0));
-      realtimeChannel.__receive(data);
+      realtimeChannel.__receive(Uint8Array.from(intArray));
     }
   };