diff --git a/controllers/statistics.go b/controllers/statistics.go
index bc6b1e8..2ee4942 100644
--- a/controllers/statistics.go
+++ b/controllers/statistics.go
@@ -281,7 +281,6 @@ func (sc *StatisticsController) chartHeartRateMeasurementHistory(c *gin.Context,
 	var records []models.MqttHeartRateRecord
 	if err := baseQuery.Session(&gorm.Session{}).
 		Order("received_at ASC").
-		Limit(10000).
 		Find(&records).Error; err != nil {
 		writeError(c, http.StatusInternalServerError, "failed to query mqtt heart rate chart records")
 		return
@@ -393,7 +392,6 @@ func (sc *StatisticsController) chartStepCountMeasurementHistory(c *gin.Context,
 	var records []models.MqttStepCountRecord
 	if err := baseQuery.Session(&gorm.Session{}).
 		Order("received_at ASC").
-		Limit(10000).
 		Find(&records).Error; err != nil {
 		writeError(c, http.StatusInternalServerError, "failed to query mqtt step count chart records")
 		return