diff --git a/src/libs/github/models/issue.py b/src/libs/github/models/issue.py
index 9c82bd6..bff0583 100644
--- a/src/libs/github/models/issue.py
+++ b/src/libs/github/models/issue.py
@@ -4,7 +4,7 @@
 @Author         : yanyongyu
 @Date           : 2021-03-11 16:57:04
 @LastEditors    : yanyongyu
-@LastEditTime   : 2021-08-20 23:32:41
+@LastEditTime   : 2021-08-20 23:52:12
 @Description    : None
 @GitHub         : https://github.com/yanyongyu
 """
@@ -53,7 +53,7 @@ class Issue(BaseModel):
     number: int
     state: str
     title: str
-    body: str
+    body: Optional[str]
     body_text: Optional[str]
     body_html: Optional[str]
     user: User
diff --git a/src/libs/github/models/timeline.py b/src/libs/github/models/timeline.py
index 1933c60..1eab78d 100644
--- a/src/libs/github/models/timeline.py
+++ b/src/libs/github/models/timeline.py
@@ -4,7 +4,7 @@
 @Author         : yanyongyu
 @Date           : 2021-05-14 00:57:33
 @LastEditors    : yanyongyu
-@LastEditTime   : 2021-08-20 23:31:52
+@LastEditTime   : 2021-08-20 23:57:43
 @Description    : None
 @GitHub         : https://github.com/yanyongyu
 """
@@ -133,7 +133,7 @@ class TimelineEventCommentDeleted(TimelineEvent):
 
 # Issue assigned to Person
 class TimelineEventAssigned(TimelineEvent):
-    type: Literal["assigned"]
+    event: Literal["assigned"]
     id: int
     node_id: str
     url: str
@@ -142,7 +142,7 @@ class TimelineEventAssigned(TimelineEvent):
     commit_url: Optional[str]
     created_at: datetime
     assignee: Actor
-    assigner: Actor
+    assigner: Optional[Actor] = None
 
 
 # Issue Mentioned Person
@@ -317,7 +317,7 @@ class TimelineEventMerged(TimelineEvent):
 
 # Pull Request Deployed
 class TimelineEventDeployed(TimelineEvent):
-    type: Literal["deployed"]
+    event: Literal["deployed"]
     id: int
     node_id: str
     url: str
diff --git a/src/plugins/github/libs/issue/templates/assigned.html b/src/plugins/github/libs/issue/templates/assigned.html
index 3a8989a..5631a02 100644
--- a/src/plugins/github/libs/issue/templates/assigned.html
+++ b/src/plugins/github/libs/issue/templates/assigned.html
@@ -2,7 +2,7 @@
  * @Author         : yanyongyu
  * @Date           : 2021-08-20 23:33:46
  * @LastEditors    : yanyongyu
- * @LastEditTime   : 2021-08-20 23:37:56
+ * @LastEditTime   : 2021-08-20 23:49:02
  * @Description    : None
  * @GitHub         : https://github.com/yanyongyu
 -->
@@ -25,20 +25,23 @@
     </svg>
   </div>
   <div class="TimelineItem-body">
-    {% set self_request = event.assigner.login == event.assignee.login %}
+    <!-- prettier-ignore -->
+    {% if event.assigner -%}
+    {% set assigner = event.assigner %}
+    {%- else -%}
+    {% set assigner = event.assignee %}
+    {%- endif %}
     <a class="d-inline-block">
       <img
         class="avatar avatar-user"
         height="20"
         width="20"
-        src="{{ event.assigner.avatar_url }}"
+        src="{{ assigner.avatar_url }}"
       />
     </a>
-    <a class="author Link--primary text-bold">
-      {{ event.assigner.login|escape }}
-    </a>
+    <a class="author Link--primary text-bold">{{ assigner.login|escape }}</a>
     <!-- prettier-ignore -->
-    {% if self_request -%}
+    {% if assigner == event.assignee -%}
     self-assigned this
     {%- else -%}
     assigned
diff --git a/src/plugins/github/plugins/github_issue/__init__.py b/src/plugins/github/plugins/github_issue/__init__.py
index 724f50d..7ce53e4 100644
--- a/src/plugins/github/plugins/github_issue/__init__.py
+++ b/src/plugins/github/plugins/github_issue/__init__.py
@@ -4,7 +4,7 @@
 @Author         : yanyongyu
 @Date           : 2021-03-09 15:15:02
 @LastEditors    : yanyongyu
-@LastEditTime   : 2021-08-19 23:19:12
+@LastEditTime   : 2021-08-20 23:58:58
 @Description    : None
 @GitHub         : https://github.com/yanyongyu
 """
@@ -127,7 +127,8 @@ async def handle_short(bot: Bot, event: GroupMessageEvent, state: T_State):
         img = await issue_to_image(owner, repo, issue_)
     except TimeoutException:
         await issue.finish(f"获取issue数据超时！请尝试重试")
-    except Error:
+    except Error as e:
+        print(repr(e))
         await issue.finish(f"生成图片超时！请尝试重试")
     else:
         if img: