diff --git a/api/lambda.go b/api/lambda.go
index b2aeaed6b8468635744c148ed8b1025cd7e8398f..c36be3b0a7dfff84fc761509603e54dd684c3154 100644
--- a/api/lambda.go
+++ b/api/lambda.go
@@ -273,6 +273,10 @@ func (api Api) Handler(baseCtx context.Context, apiGatewayProxyReq events.APIGat
 		}
 		res.Headers["Content-Type"] = "application/json"
 		res.Body = string(bodyBytes)
+	} else {
+		//no content
+		delete(res.Headers, "Content-Type")
+		res.Body = ""
 	}
 	return
 }