diff --git a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
index 62d1c7c6..562f84d3 100644
--- a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
+++ b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Vitals.m
@@ -14,7 +14,7 @@ @implementation RCTAppleHealthKit (Methods_Vitals)
 
 - (void)vitals_saveHeartRateSample:(NSDictionary *)input callback:(RCTResponseSenderBlock)callback
 {
-    NSDate *timeHeartRateSampleWasTaken = [RCTAppleHealthKit dateFromOptions:input key:@"date" withDefault:[NSDate date]];
+    NSDate *timeHeartRateSampleWasTaken = [RCTAppleHealthKit dateFromOptions:input key:@"startDate" withDefault:[NSDate date]];
     double heartRateValue = [RCTAppleHealthKit doubleFromOptions:input key:@"value" withDefault:-99];
     if(heartRateValue == -99){
         callback(@[RCTMakeError(@"heartRateValue is required in options", nil, nil)]);