diff --git a/server/bitcoin-address.js b/server/bitcoin-address.js
index 6da6a28..8f07df3 100644
--- a/server/bitcoin-address.js
+++ b/server/bitcoin-address.js
@@ -9,7 +9,7 @@ function bech32Polymod(values) {
     0x26508e6d,
     0x1ea119fa,
     0x3d4233dd,
-    0x2a1462b2,
+    0x2a1462b3,
   ]
 
   let chk = 1