diff --git a/src/index.js b/src/index.js
index 274f1aa..5e2f025 100644
--- a/src/index.js
+++ b/src/index.js
@@ -15,7 +15,7 @@ module.exports = {
   ECPointFp: ec.ECPointFp,
   ECPubKey: require('./ecpubkey'),
   Message: require('./message'),
-  Opcode: require('./opcode'),
+  opcodes: require('./opcodes'),
   HDWallet: require('./hdwallet'),
   Script: require('./script'),
   sec: require('./sec'),
diff --git a/src/opcode.js b/src/opcodes.js
similarity index 100%
rename from src/opcode.js
rename to src/opcodes.js
diff --git a/src/script.js b/src/script.js
index 6137e1d..e349d48 100644
--- a/src/script.js
+++ b/src/script.js
@@ -1,6 +1,6 @@
 var assert = require('assert')
 var crypto = require('./crypto')
-var opcodes = require('./opcode')
+var opcodes = require('./opcodes')
 
 function Script(data) {
   data = data || []