diff --git a/.travis.yml b/.travis.yml
index 9bec0b6..36701b5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,8 @@
 sudo: false
 language: node_js
 node_js:
-  - '5'
+  - '6'
   - '4'
-  - '3'
-  - '2'
-  - '1'
-  - '0.12'
-  - '0.10'
 script:
   - "npm run ci"
 after_script:
diff --git a/lib/v1/decoder.js b/lib/v1/decoder.js
index bc04fc6..46efb18 100644
--- a/lib/v1/decoder.js
+++ b/lib/v1/decoder.js
@@ -423,7 +423,7 @@ proto.readObject = function (withType) {
   debug('read object finish');
 
   // java.lang.NoClassDefFoundError
-  if (/Exception$/.test(type) || /^java\.lang\.\w+Error$/.test(type)) {
+  if (type.endsWith('Exception') || (type.startsWith('java.lang.') && type.endsWith('Error'))) {
     result.$ = new JavaExceptionError(result, withType);
   }
 
diff --git a/lib/v2/decoder.js b/lib/v2/decoder.js
index 8d8db34..82a9c5d 100644
--- a/lib/v2/decoder.js
+++ b/lib/v2/decoder.js
@@ -571,7 +571,7 @@ proto.readObject = function (withType) {
   } else {
     this.throwError('readObject', code);
   }
-  
+
   var cls = this.classes[ref];
   debug('readObject %s, ref: %s', cls.name, ref);
 
@@ -590,7 +590,7 @@ proto.readObject = function (withType) {
     }
   }
 
-  if (/Exception$/.test(cls.name)) {
+  if (cls.name.endsWith('Exception')) {
     result.$ = new JavaExceptionError(result, withType);
   }
 
@@ -759,7 +759,7 @@ utils.addByteCodes(BYTE_CODES, [
  * v2.0
  * ```
  * map        ::= M(x4d) [type] (value value)* Z
- * 
+ *
  * @see http://hessian.caucho.com/doc/hessian-serialization.html##map
  * ```
  * Represents serialized maps and can represent objects.
@@ -801,7 +801,7 @@ proto.readMap = function (withType) {
   this._addRef(result);
   this._readMap(result.$, withType);
 
-  if (/Exception$/.test(type)) {
+  if (type.endsWith('Exception')) {
     result.$ = new JavaExceptionError(result);
   }
 
diff --git a/package.json b/package.json
index 1e5769e..82af3d9 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,6 @@
     "should": "5"
   },
   "engines": {
-    "node": ">= 0.10.0"
+    "node": ">= 4"
   }
 }