diff --git a/lib/BlockExtractor.js b/lib/BlockExtractor.js
index 1802788..857ed71 100644
--- a/lib/BlockExtractor.js
+++ b/lib/BlockExtractor.js
@@ -3,7 +3,8 @@
 require('classtool');
 
 function spec() {
-  var Block = require('bitcore/block').class(),
+
+  var Block = require('bitcore/Block').class(),
    networks = require('bitcore/networks'),
    Parser   = require('bitcore/util/BinaryParser').class(),
    fs       = require('fs'),