diff --git a/README.md b/README.md
index 4e640f5..bb88dd7 100644
--- a/README.md
+++ b/README.md
@@ -39,13 +39,13 @@ class testModel extends Model{
 }
 ```
 
-you can tag, retag, detag, untag, by id
+you can categorize, recategorize, decategorize, uncategorize, by id
 
 ``` php
-testModel->tagId(1);
-testModel->untagId(1);
-testModel->retagId(2);
-testModel->detagId(2);
+testModel->categorize(1);
+testModel->recategorize(1);
+testModel->decategorize(0);
+testModel->uncategorize(2);
 ```
 
 alse use id find Model (get model)
diff --git a/src/Categorizable.php b/src/Categorizable.php
index 4ed2cb4..42c02ff 100644
--- a/src/Categorizable.php
+++ b/src/Categorizable.php
@@ -19,11 +19,16 @@ public function categorize($categories)
         return $this->tag($categories);
     }
 
-    public function decategorize($categories)
+    public function uncategorize($categories)
     {
         return $this->untag($categories);
     }
 
+    public function decategorize($categories)
+    {
+        return $this->detag($categories);
+    }
+
     public function recategorize($categories)
     {
         return $this->retag($categories);
diff --git a/tests/CategoryTest.php b/tests/CategoryTest.php
index 6ab4b17..bf2836f 100644
--- a/tests/CategoryTest.php
+++ b/tests/CategoryTest.php
@@ -70,7 +70,7 @@ public function testCategorizeByManyId()
     public function testCategoryUnTagId()
     {
         $this->testModel->categorize([1,2,3]);
-        $this->testModel->decategorize(1);
+        $this->testModel->uncategorize(1);
         $this->assertEquals(
             "2,3",
             $this->testModel->tagList
@@ -90,7 +90,7 @@ public function testCategoryReTagId()
     public function testCategoryDeTagId()
     {
         $this->testModel->categorize(1);
-        $this->testModel->decategorize(1);
+        $this->testModel->uncategorize(1);
         $this->assertEquals(
             "",
             $this->testModel->tagList