diff --git a/tests/trace/test_client_feedback.py b/tests/trace/test_client_feedback.py
index 82d87198e13..c01127370a5 100644
--- a/tests/trace/test_client_feedback.py
+++ b/tests/trace/test_client_feedback.py
@@ -228,7 +228,7 @@ def test_feedback_payload(client):
 def test_feedback_create_too_large(client):
     project_id = client._project_id()
 
-    value = "a" * 10000
+    value = "a" * (1 << 21)  # > 1 MiB, past the limit
     req = tsi.FeedbackCreateReq(
         project_id=project_id,
         wb_user_id="VXNlcjo0NTI1NDQ=",
diff --git a/weave/trace_server/clickhouse_trace_server_batched.py b/weave/trace_server/clickhouse_trace_server_batched.py
index 973d51080e2..e97e020b1ab 100644
--- a/weave/trace_server/clickhouse_trace_server_batched.py
+++ b/weave/trace_server/clickhouse_trace_server_batched.py
@@ -1312,7 +1312,7 @@ def feedback_create(self, req: tsi.FeedbackCreateReq) -> tsi.FeedbackCreateRes:
         created_at = datetime.datetime.now(ZoneInfo("UTC"))
         # TODO: Any validation on weave_ref?
         payload = _dict_value_to_dump(req.payload)
-        MAX_PAYLOAD = 1024
+        MAX_PAYLOAD = 1 << 20  # 1 MiB
         if len(payload) > MAX_PAYLOAD:
             raise InvalidRequest("Feedback payload too large")
         row: Row = {