diff --git a/src/aioweb/responses.py b/src/aioweb/responses.py
index 697598b..53f8bd1 100644
--- a/src/aioweb/responses.py
+++ b/src/aioweb/responses.py
@@ -92,7 +92,9 @@ class Response:
         """parsed JSON content, or None if not valid JSON"""
         try:
             return _json.loads(self.text())
-        except _json.JSONDecodeError:
+        except (_json.JSONDecodeError, UnicodeDecodeError):
+            # text() decodes the body and can raise UnicodeDecodeError on a non-UTF-8
+            # payload — that's a "not valid JSON" outcome, not an error to propagate
             return None
 
     def raise_for_status(self):