diff --git a/.github/workflows/close-issue.yml b/.github/workflows/close-issue.yml
new file mode 100644
index 0000000..d5cd3cf
--- /dev/null
+++ b/.github/workflows/close-issue.yml
@@ -0,0 +1,22 @@
+name: Close inactive issues
+on:
+  schedule:
+    - cron: "30 1 * * *"
+
+jobs:
+  close-issues:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+      - uses: actions/stale@v5
+        with:
+          days-before-issue-stale: 30
+          days-before-issue-close: 14
+          stale-issue-label: "stale"
+          stale-issue-message: "This issue is stale because it has been open for 30 days with no activity."
+          close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
+          days-before-pr-stale: -1
+          days-before-pr-close: -1
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
index a7ef90f..f5bd3e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,6 @@ logs
 .idea/
 __pycache__/
 /knowledge_base/
-configs/*.py
+/configs/*.py
 .vscode/
 .pytest_cache/
diff --git a/README.md b/README.md
index 1090ac9..453a491 100644
--- a/README.md
+++ b/README.md
@@ -485,6 +485,6 @@ $ streamlit run webui.py --server.port 666
 
 ## 项目交流群
 
-<img src="img/qr_code_59.jpg" alt="二维码" width="300" height="300" />
+<img src="img/qr_code_60.jpg" alt="二维码" width="300" height="300" />
 
 🎉 langchain-ChatGLM 项目微信交流群，如果你也对本项目感兴趣，欢迎加入群聊参与讨论交流。
diff --git a/document_loaders/mypdfloader.py b/document_loaders/mypdfloader.py
index 71e063d..a3153a8 100644
--- a/document_loaders/mypdfloader.py
+++ b/document_loaders/mypdfloader.py
@@ -5,7 +5,7 @@ from langchain.document_loaders.unstructured import UnstructuredFileLoader
 class RapidOCRPDFLoader(UnstructuredFileLoader):
     def _get_elements(self) -> List:
         def pdf2text(filepath):
-            import fitz
+            import fitz # pyMuPDF里面的fitz包，不要与pip install fitz混淆
             from rapidocr_onnxruntime import RapidOCR
             import numpy as np
             ocr = RapidOCR()
diff --git a/img/qr_code_60.jpg b/img/qr_code_60.jpg
new file mode 100644
index 0000000..0188834
Binary files /dev/null and b/img/qr_code_60.jpg differ
diff --git a/server/knowledge_base/utils.py b/server/knowledge_base/utils.py
index a8a9bcc..fe7fce1 100644
--- a/server/knowledge_base/utils.py
+++ b/server/knowledge_base/utils.py
@@ -91,8 +91,8 @@ LOADER_DICT = {"UnstructuredHTMLLoader": ['.html'],
                "RapidOCRLoader": ['.png', '.jpg', '.jpeg', '.bmp'],
                "UnstructuredFileLoader": ['.eml', '.msg', '.rst',
                                           '.rtf', '.txt', '.xml',
-                                          '.doc', '.docx', '.epub', '.odt',
-                                          '.ppt', '.pptx', '.tsv'],  # '.xlsx'
+                                          '.docx', '.epub', '.odt',
+                                          '.ppt', '.pptx', '.tsv'],
                }
 SUPPORTED_EXTS = [ext for sublist in LOADER_DICT.values() for ext in sublist]
 
diff --git a/webui_pages/dialogue/dialogue.py b/webui_pages/dialogue/dialogue.py
index 25b885b..afefe32 100644
--- a/webui_pages/dialogue/dialogue.py
+++ b/webui_pages/dialogue/dialogue.py
@@ -153,9 +153,10 @@ def dialogue_page(api: ApiRequest):
             for d in api.knowledge_base_chat(prompt, selected_kb, kb_top_k, score_threshold, history, model=llm_model):
                 if error_msg := check_error_msg(d): # check whether error occured
                     st.error(error_msg)
-                text += d["answer"]
-                chat_box.update_msg(text, 0)
-                chat_box.update_msg("\n\n".join(d["docs"]), 1, streaming=False)
+                else:
+                    text += d["answer"]
+                    chat_box.update_msg(text, 0)
+                    chat_box.update_msg("\n\n".join(d["docs"]), 1, streaming=False)
             chat_box.update_msg(text, 0, streaming=False)
         elif dialogue_mode == "搜索引擎问答":
             chat_box.ai_say([