diff --git a/framework/helpers/JsonExpression.php b/framework/helpers/JsExpression.php
similarity index 91%
rename from framework/helpers/JsonExpression.php
rename to framework/helpers/JsExpression.php
index eee57a1..0054b64 100644
--- a/framework/helpers/JsonExpression.php
+++ b/framework/helpers/JsExpression.php
@@ -10,13 +10,13 @@ namespace yii\helpers;
 use yii\base\Object;
 
 /**
- * JsonExpression marks a string as a JavaScript expression.
+ * JsExpression marks a string as a JavaScript expression.
  * When using [[Json::encode()]] to encode a value, JsonExpression objects
  * will be specially handled and encoded as a JavaScript expression instead of a string.
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
-class JsonExpression extends Object
+class JsExpression extends Object
 {
 	/**
 	 * @var string the JavaScript expression represented by this object
diff --git a/framework/helpers/base/Json.php b/framework/helpers/base/Json.php
index d39b2b3..1deb5c2 100644
--- a/framework/helpers/base/Json.php
+++ b/framework/helpers/base/Json.php
@@ -8,7 +8,7 @@
 namespace yii\helpers\base;
 
 use yii\base\InvalidParamException;
-use yii\helpers\JsonExpression;
+use yii\helpers\JsExpression;
 
 /**
  * Json is a helper class providing JSON data encoding and decoding.
@@ -23,7 +23,7 @@ class Json
 	 * Encodes the given value into a JSON string.
 	 * The method enhances `json_encode()` by supporting JavaScript expressions.
 	 * In particular, the method will not encode a JavaScript expression that is
-	 * represented in terms of a [[JsonExpression]] object.
+	 * represented in terms of a [[JsExpression]] object.
 	 * @param mixed $value the data to be encoded
 	 * @param integer $options the encoding options. For more details please refer to
 	 * [[http://www.php.net/manual/en/function.json-encode.php]]
@@ -86,7 +86,7 @@ class Json
 			}
 			return $data;
 		} elseif (is_object($data)) {
-			if ($data instanceof JsonExpression) {
+			if ($data instanceof JsExpression) {
 				$token = '!{[' . count($expressions) . ']}!';
 				$expressions['"' . $token . '"'] = $data->expression;
 				return $token;
diff --git a/tests/unit/framework/helpers/JsonTest.php b/tests/unit/framework/helpers/JsonTest.php
index 3459a54..0e06eb3 100644
--- a/tests/unit/framework/helpers/JsonTest.php
+++ b/tests/unit/framework/helpers/JsonTest.php
@@ -4,7 +4,7 @@
 namespace yiiunit\framework\helpers;
 
 use yii\helpers\Json;
-use yii\helpers\JsonExpression;
+use yii\helpers\JsExpression;
 
 class JsonTest extends \yii\test\TestCase
 {
@@ -27,7 +27,7 @@ class JsonTest extends \yii\test\TestCase
 
 		// expression encoding
 		$expression = 'function () {}';
-		$data = new JsonExpression($expression);
+		$data = new JsExpression($expression);
 		$this->assertSame($expression, Json::encode($data));
 
 		// complex data
@@ -35,9 +35,9 @@ class JsonTest extends \yii\test\TestCase
 		$expression2 = 'function (b) {}';
 		$data = array(
 			'a' => array(
-				1, new JsonExpression($expression1)
+				1, new JsExpression($expression1)
 			),
-			'b' => new JsonExpression($expression2),
+			'b' => new JsExpression($expression2),
 		);
 		$this->assertSame("{\"a\":[1,$expression1],\"b\":$expression2}", Json::encode($data));
 	}