diff --git a/indextts/infer_v2.py b/indextts/infer_v2.py
index d34f01b..53e34be 100644
--- a/indextts/infer_v2.py
+++ b/indextts/infer_v2.py
@@ -763,6 +763,13 @@ class QwenEmotion:
         self.min_score = 0.0
 
     def clamp_score(self, value):
+        try:
+            value = float(value)
+        except (TypeError, ValueError) as exc:
+            raise ValueError(
+                f"QwenEmotion returned a non-numeric emotion score {value!r}. "
+                "Please retry the request."
+            ) from exc
         return max(self.min_score, min(self.max_score, value))
 
     def convert(self, content):