diff --git a/src/Bot/Client.php b/src/Bot/Client.php
index 24ee1be..fe0b59d 100644
--- a/src/Bot/Client.php
+++ b/src/Bot/Client.php
@@ -313,6 +313,48 @@ public function dialogClose(string $request)
         return $adapter->getResponseModel($response);
     }
 
+    /**
+     * Add tag to dialog
+     *
+     * @param Model\Request\DialogTagRequest $request Request parameters
+     *
+     * @return \RetailCrm\Mg\Bot\Model\ModelInterface
+     * @throws \Exception
+     */
+    public function dialogAddTag(Model\Request\DialogTagRequest $request)
+    {
+        $response = $this->client->makeRequest(
+            sprintf("/dialogs/%d/tags/add", $request->getDialogId()),
+            HttpClient::METHOD_PATCH,
+            $request
+        );
+
+        $adapter = new ModelAdapter(ErrorOnlyResponse::class);
+
+        return $adapter->getResponseModel($response);
+    }
+
+    /**
+     * Delete tag from dialog
+     *
+     * @param Model\Request\DialogTagRequest $request Request parameters
+     *
+     * @return \RetailCrm\Mg\Bot\Model\ModelInterface
+     * @throws \Exception
+     */
+    public function dialogDeleteTag(Model\Request\DialogTagRequest $request)
+    {
+        $response = $this->client->makeRequest(
+            sprintf("/dialogs/%d/tags/delete", $request->getDialogId()),
+            HttpClient::METHOD_PATCH,
+            $request
+        );
+
+        $adapter = new ModelAdapter(ErrorOnlyResponse::class);
+
+        return $adapter->getResponseModel($response);
+    }
+
     /**
      * Returns filtered members list
      *
diff --git a/src/Bot/Model/Entity/Tag.php b/src/Bot/Model/Entity/Tag.php
new file mode 100644
index 0000000..6b6ff39
--- /dev/null
+++ b/src/Bot/Model/Entity/Tag.php
@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * PHP version 7.1
+ *
+ * Tag entity
+ *
+ * @package  RetailCrm\Mg\Bot\Model\Entity
+ */
+
+namespace RetailCrm\Mg\Bot\Model\Entity;
+
+use JMS\Serializer\Annotation\Accessor;
+use JMS\Serializer\Annotation\SkipWhenEmpty;
+use JMS\Serializer\Annotation\Type;
+use RetailCrm\Mg\Bot\Model\ModelInterface;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * Tag class
+ *
+ * @package  RetailCrm\Mg\Bot\Model\Entity
+ */
+class Tag implements ModelInterface
+{
+    /**
+     * @var string $name
+     *
+     * @Type("string")
+     * @Accessor(getter="getName",setter="setName")
+     *
+     * @Assert\NotBlank
+     */
+    private $name;
+
+    /**
+     * @var string $colorCode
+     *
+     * @Type("string")
+     * @Accessor(getter="getColorCode",setter="setColorCode")
+     * @SkipWhenEmpty()
+     */
+    private $colorCode;
+
+    /**
+     * @return string
+     */
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    /**
+     * @param string $name
+     * @return void
+     */
+    public function setName(string $name): void
+    {
+        $this->name = $name;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getColorCode(): ?string
+    {
+        return $this->colorCode;
+    }
+
+    /**
+     * @param string $colorCode
+     * @return void
+     */
+    public function setColorCode(string $colorCode): void
+    {
+        $this->colorCode = $colorCode;
+    }
+}
diff --git a/src/Bot/Model/Request/DialogTagRequest.php b/src/Bot/Model/Request/DialogTagRequest.php
new file mode 100644
index 0000000..6b133af
--- /dev/null
+++ b/src/Bot/Model/Request/DialogTagRequest.php
@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * PHP version 7.1
+ *
+ * Dialog add or delete tag request
+ *
+ * @package RetailCrm\Mg\Bot\Model\Request
+ */
+
+namespace RetailCrm\Mg\Bot\Model\Request;
+
+use JMS\Serializer\Annotation\Accessor;
+use JMS\Serializer\Annotation\SkipWhenEmpty;
+use JMS\Serializer\Annotation\Type;
+use RetailCrm\Mg\Bot\Model\Entity\Tag;
+use RetailCrm\Mg\Bot\Model\ModelInterface;
+
+/**
+ * DialogTagRequest class
+ *
+ * @package  RetailCrm\Mg\Bot\Model\Request
+ */
+class DialogTagRequest implements ModelInterface
+{
+    /**
+     * @var int $dialogId
+     *
+     * @Type("int")
+     * @Accessor(getter="getDialogId", setter="setDialogId")
+     * @SkipWhenEmpty()
+     */
+    private $dialogId;
+
+    /**
+     * @var Tag[] $tags
+     *
+     * @Type("array")
+     * @Accessor(getter="getTags", setter="setTags")
+     * @SkipWhenEmpty()
+     */
+    private $tags;
+
+    /**
+     * @return int
+     */
+    public function getDialogId(): int
+    {
+        return $this->dialogId;
+    }
+
+    /**
+     * @param int $dialogId
+     * @return void
+     */
+    public function setDialogId(int $dialogId): void
+    {
+        $this->dialogId = $dialogId;
+    }
+
+    /**
+     * @return Tag[]
+     */
+    public function getTags(): array
+    {
+        return $this->tags;
+    }
+
+    /**
+     * @param Tag[] $tags
+     * @return void
+     */
+    public function setTags(array $tags): void
+    {
+        $this->tags = $tags;
+    }
+
+}
diff --git a/tests/Bot/Tests/DialogsTest.php b/tests/Bot/Tests/DialogsTest.php
index 08ee4d3..61dbe7f 100644
--- a/tests/Bot/Tests/DialogsTest.php
+++ b/tests/Bot/Tests/DialogsTest.php
@@ -14,7 +14,9 @@
 use InvalidArgumentException;
 use RetailCrm\Common\Exception\NotFoundException;
 use RetailCrm\Mg\Bot\Model\Entity\Responsible;
+use RetailCrm\Mg\Bot\Model\Entity\Tag;
 use RetailCrm\Mg\Bot\Model\Request\DialogAssignRequest;
+use RetailCrm\Mg\Bot\Model\Request\DialogTagRequest;
 use RetailCrm\Mg\Bot\Model\Response\ErrorOnlyResponse;
 use RetailCrm\Mg\Bot\Test\TestCase;
 
@@ -145,4 +147,180 @@ public function testDialogClose()
         self::assertTrue($response->isSuccessful());
         self::assertEmpty($response->getErrors());
     }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogAddTagColorError()
+    {
+        $this->expectException(NotFoundException::class);
+
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getErrorsResponse(404,
+                "'color_code can contain only the following values: " .
+                "light-red; light-blue; light-green; light-orange; light-gray; " .
+                "light-grayish-blue; red; blue; green; orange; gray; grayish-blue'"
+            )
+        );
+
+        $tags[0] = new Tag();
+        $tags[0]->setName('tag1');
+        $tags[0]->setColorCode('qwerty');
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(60);
+        $request->setTags($tags);
+
+        $client->dialogAddTag($request);
+    }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogAddTagDialogError()
+    {
+        $this->expectException(NotFoundException::class);
+
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getErrorsResponse(404, "dialog #123456789 not found")
+        );
+
+        $tags[0] = new Tag();
+        $tags[0]->setName('tag1');
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(123456789);
+        $request->setTags($tags);
+
+        $client->dialogAddTag($request);
+    }
+
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogAddTagEmptyTagError()
+    {
+        $this->expectException(\TypeError::class);
+
+        $client = self::getApiClient();
+
+        $tags[0] = new Tag();
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(60);
+        $request->setTags($tags);
+
+        $client->dialogAddTag($request);
+    }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogAddTag()
+    {
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getResponse('{}')
+        );
+
+        $tags[0] = new Tag();
+        $tags[0]->setName('tag1');
+        $tags[0]->setColorCode('red');
+
+        $tags[1] = new Tag();
+        $tags[1]->setName('tag2');
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(60);
+        $request->setTags($tags);
+
+        $response = $client->dialogAddTag($request);
+
+        self::assertInstanceOF(ErrorOnlyResponse::class, $response);
+        self::assertTrue($response->isSuccessful());
+        self::assertEmpty($response->getErrors());
+    }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogDeleteTagDialogError()
+    {
+        $this->expectException(NotFoundException::class);
+
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getErrorsResponse(404, "dialog #123456789 not found")
+        );
+
+        $tags[0] = new Tag();
+        $tags[0]->setName('tag1');
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(123456789);
+        $request->setTags($tags);
+
+        $client->dialogAddTag($request);
+    }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogDeleteTagEmptyTagError()
+    {
+        $this->expectException(\TypeError::class);
+
+        $client = self::getApiClient();
+
+        $tags[0] = new Tag();
+
+        $request = new DialogTagRequest();
+        $request->setTags($tags);
+
+        $client->dialogDeleteTag($request);
+    }
+
+    /**
+     * @group("dialogs")
+     * @throws \Exception
+     */
+    public function testDialogDeleteTag()
+    {
+        $client = self::getApiClient(
+            null,
+            null,
+            false,
+            $this->getResponse('{}')
+        );
+
+        $tags[0] = new Tag();
+        $tags[0]->setName('tag1');
+
+        $request = new DialogTagRequest();
+        $request->setDialogId(60);
+        $request->setTags($tags);
+
+        $response = $client->dialogDeleteTag($request);
+
+        self::assertInstanceOF(ErrorOnlyResponse::class, $response);
+        self::assertTrue($response->isSuccessful());
+        self::assertEmpty($response->getErrors());
+    }
 }