diff --git a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Body.m b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Body.m
index 8fec38d4bae8f3091f392da38d6f73340aeea24e..ca11ae220822785933ee0a478ce51c883ff88566 100644
--- a/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Body.m
+++ b/RCTAppleHealthKit/RCTAppleHealthKit+Methods_Body.m
@@ -82,7 +82,7 @@
 - (void)body_saveWeight:(NSDictionary *)input callback:(RCTResponseSenderBlock)callback
 {
     double weight = [RCTAppleHealthKit doubleValueFromOptions:input];
-    NSDate *sampleDate = [RCTAppleHealthKit dateFromOptionsDefaultNow:input];
+    NSDate *sampleDate = [RCTAppleHealthKit dateFromOptions:input key:@"startDate" withDefault:[NSDate date]];
     HKUnit *unit = [RCTAppleHealthKit hkUnitFromOptions:input key:@"unit" withDefault:[HKUnit poundUnit]];
 
     HKQuantity *weightQuantity = [HKQuantity quantityWithUnit:unit doubleValue:weight];
diff --git a/README.md b/README.md
index 94c88a1c7a2befb8af33548cf9c1ff45f3ab1368..d59e3df26ce690088e2e23870f609588d89e1f93 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ AppleHealthKit.initHealthKit(options: Object, (err: string, results: Object) =>
 ## Changelog
 0.6.4v
 - Basal energy ([#23](https://github.com/terrillo/rn-apple-healthkit/pull/23))
+- Fixed issues with saving weight in the past
 
 0.6.3v
 - Food and Water ([#19](https://github.com/terrillo/rn-apple-healthkit/pull/19))