diff --git a/index.html b/index.html
index a0970ea..ea1e7b5 100644
--- a/index.html
+++ b/index.html
@@ -340,6 +340,9 @@
       src="scripts/btcwallet_scripts_lib.js"
       type="text/javascript"
     ></script>
+
+    <!-- ethers.js version 5.6 -->
+
     <script src="https://cdn.jsdelivr.net/gh/ethereumjs/browser-builds/dist/ethereumjs-tx/ethereumjs-tx-1.3.3.min.js"></script>
     <script src="scripts/btcOperator.js" type="text/javascript"></script>
     <script src="scripts/floCrypto.js" type="text/javascript"></script>