diff --git a/src/nizsheanez/jsonRpc/Action.php b/src/nizsheanez/jsonRpc/Action.php
index 5ce1b49..8054a47 100644
--- a/src/nizsheanez/jsonRpc/Action.php
+++ b/src/nizsheanez/jsonRpc/Action.php
@@ -5,6 +5,7 @@
 use ReflectionClass;
 use ReflectionMethod;
 use yii\web\HttpException;
+use nizsheanez\jsonRpc\Exception;
 
 
 /**
diff --git a/src/nizsheanez/jsonRpc/traits/Request.php b/src/nizsheanez/jsonRpc/traits/Request.php
index c445b01..a36064b 100644
--- a/src/nizsheanez/jsonRpc/traits/Request.php
+++ b/src/nizsheanez/jsonRpc/traits/Request.php
@@ -1,6 +1,8 @@
 <?php
 namespace nizsheanez\jsonRpc\traits;
 
+use nizsheanez\jsonRpc\Exception;
+
 trait Request {
 
     private $_requestMessage;
diff --git a/src/nizsheanez/jsonRpc/traits/Serializable.php b/src/nizsheanez/jsonRpc/traits/Serializable.php
index 754abe2..01a1150 100644
--- a/src/nizsheanez/jsonRpc/traits/Serializable.php
+++ b/src/nizsheanez/jsonRpc/traits/Serializable.php
@@ -1,6 +1,8 @@
 <?php
 namespace nizsheanez\jsonRpc\traits;
 
+use nizsheanez\jsonRpc\Exception;
+
 trait Serializable
 {