diff --git a/metagpt/utils/repair_llm_raw_output.py b/metagpt/utils/repair_llm_raw_output.py
index b8756e8c6..17e095c5f 100644
--- a/metagpt/utils/repair_llm_raw_output.py
+++ b/metagpt/utils/repair_llm_raw_output.py
@@ -340,7 +340,9 @@ def extract_state_value_from_output(content: str) -> str:
         content (str): llm's output from `Role._think`
     """
     content = content.strip()  # deal the output cases like " 0", "0\n" and so on.
-    pattern = r"([0-9])"  # TODO find the number using a more proper method not just extract from content using pattern
+    pattern = (
+        r"(?<!-)[0-9]"  # TODO find the number using a more proper method not just extract from content using pattern
+    )
     matches = re.findall(pattern, content, re.DOTALL)
     matches = list(set(matches))
     state = matches[0] if len(matches) > 0 else "-1"