diff --git a/util/model_util.py b/util/model_util.py
index 9d3324b..6cdd2ae 100644
--- a/util/model_util.py
+++ b/util/model_util.py
@@ -200,6 +200,8 @@ def clas_text(text):
     if not text:
         return None
     url = 'http://clas_text:5008'
+    if len(text) > 2048:
+        text = text[:2048]
     response = requests.post(url, {'text': text})
     if response.status_code == 200:
         return response.json()