diff --git a/api/core/llm_generator/prompts.py b/api/core/llm_generator/prompts.py
index bf7cf90640eae0..275fcbed153558 100644
--- a/api/core/llm_generator/prompts.py
+++ b/api/core/llm_generator/prompts.py
@@ -71,13 +71,15 @@
 )
 
 GENERATOR_QA_PROMPT = (
-    "<Task> The user will send a long text. Generate a Question and Answer pairs only using the knowledge in the long text. Please think step by step."  # noqa: E501
+    "<Task> The user will send a long text. Generate a Question and Answer pairs only using the knowledge"
+    " in the long text. Please think step by step."
     "Step 1: Understand and summarize the main content of this text.\n"
     "Step 2: What key information or concepts are mentioned in this text?\n"
     "Step 3: Decompose or combine multiple pieces of information and concepts.\n"
     "Step 4: Generate questions and answers based on these key information and concepts.\n"
     "<Constraints> The questions should be clear and detailed, and the answers should be detailed and complete. "
-    "You must answer in {language}, in a style that is clear and detailed in {language}. No language other than {language} should be used. \n"  # noqa: E501
+    "You must answer in {language}, in a style that is clear and detailed in {language}."
+    " No language other than {language} should be used. \n"  # noqa: E501
     "<Format> Use the following format: Q1:\nA1:\nQ2:\nA2:...\n"
     "<QA Pairs>"
 )