diff --git a/src/client/index.html b/src/client/index.html
index a9dddd2fd7c617a0b0794901d7a6fb8f988842b2..58349cead4ce88af74063e94ca96980bb3b96923 100644
--- a/src/client/index.html
+++ b/src/client/index.html
@@ -1,6 +1,9 @@
 <!DOCTYPE html>
 <html>
-
+  <script>
+    // See https://github.com/facebook/react/issues/20829#issuecomment-802088260
+    if (!crossOriginIsolated) SharedArrayBuffer = ArrayBuffer;
+  </script>
 <head>
   <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1">