diff --git a/package-lock.json b/package-lock.json
index d4601cc..09bd90d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@bsv/sdk",
-  "version": "1.2.19",
+  "version": "1.2.20",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@bsv/sdk",
-      "version": "1.2.19",
+      "version": "1.2.20",
       "license": "SEE LICENSE IN LICENSE.txt",
       "devDependencies": {
         "@types/jest": "^29.5.14",
diff --git a/package.json b/package.json
index 37cee72..31766af 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bsv/sdk",
-  "version": "1.2.19",
+  "version": "1.2.20",
   "type": "module",
   "description": "BSV Blockchain Software Development Kit",
   "main": "dist/cjs/mod.js",
diff --git a/src/transaction/Transaction.ts b/src/transaction/Transaction.ts
index 7987cf6..25935bc 100644
--- a/src/transaction/Transaction.ts
+++ b/src/transaction/Transaction.ts
@@ -439,7 +439,7 @@ export default class Transaction {
     this.cachedHash = undefined
     if (!output.change) {
       if (typeof output.satoshis === 'undefined') throw new Error('either satoshis must be defined or change must be set to true')
-      if (output.satoshis <= 0) throw new Error('satoshis must be a positive integer or zero')
+      if (output.satoshis < 0) throw new Error('satoshis must be a positive integer or zero')
     }
     if (!output.lockingScript) throw new Error('lockingScript must be defined')
     this.outputs.push(output)