diff --git a/index.js b/index.js
index a3fa20a1..70e89d02 100644
--- a/index.js
+++ b/index.js
@@ -2,14 +2,14 @@
 const Obfuscator_1 = require('./src/Obfuscator');
 let escodegen = require('escodegen'), esprima = require('esprima');
 class JavaScriptObfuscator {
-    static obfuscate(sourceCode, options) {
+    static obfuscate(sourceCode, options = {}) {
         let astTree = esprima.parse(sourceCode), obfuscator = new Obfuscator_1.Obfuscator(options);
         obfuscator.obfuscateNode(astTree);
         return JavaScriptObfuscator.generateCode(astTree, options);
     }
-    static generateCode(astTree, options) {
+    static generateCode(astTree, options = {}) {
         let escodegenParams = Object.assign({}, JavaScriptObfuscator.escodegenParams);
-        if (options.compact !== undefined) {
+        if (options.hasOwnProperty('compact')) {
             escodegenParams.format.compact = options.compact;
         }
         return escodegen.generate(astTree, escodegenParams);
diff --git a/index.ts b/index.ts
index dc32fc67..dc27da38 100644
--- a/index.ts
+++ b/index.ts
@@ -22,7 +22,7 @@ export class JavaScriptObfuscator {
      * @param sourceCode
      * @param options
      */
-    public static obfuscate (sourceCode: string, options: any): string {
+    public static obfuscate (sourceCode: string, options: any = {}): string {
         let astTree: any = esprima.parse(sourceCode),
             obfuscator: Obfuscator = new Obfuscator(options);
 
@@ -35,10 +35,10 @@ export class JavaScriptObfuscator {
      * @param astTree
      * @param options
      */
-    private static generateCode (astTree: any, options: any): string {
+    private static generateCode (astTree: any, options: any = {}): string {
         let escodegenParams: any = Object.assign({}, JavaScriptObfuscator.escodegenParams);
 
-        if (options.compact !== undefined) {
+        if (options.hasOwnProperty('compact')) {
             escodegenParams.format.compact = options.compact;
         }
 
diff --git a/src/NodeUtils.js b/src/NodeUtils.js
index 5e66f4bf..706bd96f 100644
--- a/src/NodeUtils.js
+++ b/src/NodeUtils.js
@@ -1,4 +1,5 @@
 "use strict";
+let estraverse = require('estraverse');
 class NodeUtils {
     static getNodeScope(node, deep = 0) {
         let scopeNodes = [
@@ -16,6 +17,19 @@ class NodeUtils {
         if (deep > 0) {
             return NodeUtils.getNodeScope(node.parentNode, --deep);
         }
+        if (node.type !== 'BlockStatement') {
+            let blockStatementNode;
+            estraverse.traverse(node, {
+                enter: function (node, parent) {
+                    switch (node.type) {
+                        case 'BlockStatement':
+                            blockStatementNode = node;
+                            this['break']();
+                    }
+                }
+            });
+            return blockStatementNode;
+        }
         return node;
     }
     static getParentNodeWithType(node, types, limitNodeTypes = [], deep = 0) {
diff --git a/src/NodeUtils.ts b/src/NodeUtils.ts
index c517df7a..b50023fb 100644
--- a/src/NodeUtils.ts
+++ b/src/NodeUtils.ts
@@ -1,3 +1,5 @@
+let estraverse = require('estraverse');
+
 export class NodeUtils {
     /**
      * @param node
@@ -23,6 +25,23 @@ export class NodeUtils {
             return NodeUtils.getNodeScope(node.parentNode, --deep);
         }
 
+        if (node.type !== 'BlockStatement') {
+            let blockStatementNode: any;
+
+            estraverse.traverse(node, {
+                enter: function (node, parent) {
+                    switch (node.type) {
+                        case 'BlockStatement':
+                            blockStatementNode = node;
+
+                            this['break']();
+                    }
+                }
+            });
+
+            return blockStatementNode;
+        }
+
         return node; // BlockStatement of scopeNodes
     }