diff --git a/src/index.ts b/src/index.ts
index 8253d89..caeee53 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -46,15 +46,15 @@ export class SilentPayment {
         continue;
       }
 
-      const result = bech32m.decode(target.silentPaymentCode, 117);
+      const result = bech32m.decode(target.silentPaymentCode, 118);
       const version = result.words.shift();
+      if (version !== 0) {
+        throw new Error("Unexpected version of silent payment code");
+      }
       const data = bech32m.fromWords(result.words);
       const Bscan = Buffer.from(data.slice(0, 33));
       const Bm = Buffer.from(data.slice(33));
 
-      if (version !== 0) {
-        throw new Error("Unexpected version of silent payment code");
-      }
       // Addresses with the same Bscan key all belong to the same recipient
       const recipient = silentPaymentGroups.find((group) => Buffer.compare(group.Bscan, Bscan) === 0);
       if (recipient) {
diff --git a/tests/data/sending_test_vectors.json b/tests/data/sending_test_vectors.json
index d5439b9..9cc10f9 100644
--- a/tests/data/sending_test_vectors.json
+++ b/tests/data/sending_test_vectors.json
@@ -38,6 +38,45 @@
       ]
     }
   },
+  {
+    "comment": "Simple send: two inputs, regtest",
+    "given": {
+      "outpoints": [
+        [
+          "f4184fc596403b9d638783cf57adfe4c75c605f6356fbc91338530e9831e9e16",
+          0
+        ],
+        [
+          "a1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d",
+          0
+        ]
+      ],
+      "input_priv_keys": [
+        [
+          "eadc78165ff1f8ea94ad7cfdc54990738a4c53f6e0507b42154201b8e5dff3b1",
+          false
+        ],
+        [
+          "93f5ed907ad5b2bdbbdcb5d9116ebc0a4e1f92f910d5260237fa45a9408aad16",
+          false
+        ]
+      ],
+      "recipients": [
+        [
+          "sprt1qqw4c54wvvwt6m38rg6vz3gs46ukhtrqr6qttd9akwaqjkx0znnme6qertwh7y9gq3zy4hhlk7tlgssyuvvmgl9stw8catdph0zc3wayd9y4rrztx",
+          1
+        ]
+      ]
+    },
+    "expected": {
+      "outputs": [
+        [
+          "848b21b6ab50bf12ea5829955b9557cd6d7c3e0e2b7a5448d9e46a6a935b69a2",
+          1
+        ]
+      ]
+    }
+  },
   {
     "comment": "Simple send: two inputs, order reversed",
     "given": {