diff --git a/index.html b/index.html
index 4881803..1e01d89 100644
--- a/index.html
+++ b/index.html
@@ -337,6 +337,9 @@
       src="scripts/btcwallet_scripts_lib.js"
       type="text/javascript"
     ></script>
+
+    <!-- ethers.js version 5.6 -->
+
     <script src="scripts/btcOperator.js" type="text/javascript"></script>
     <script src="scripts/floCrypto.js" type="text/javascript"></script>
     <script src="scripts/tap_combined.js" type="text/javascript"></script>