diff --git a/Sources/Amplitude/Amplitude.h b/Sources/Amplitude/Amplitude.h
index 7616991d..ac5eded7 100644
--- a/Sources/Amplitude/Amplitude.h
+++ b/Sources/Amplitude/Amplitude.h
@@ -65,12 +65,12 @@ typedef NSDictionary *_Nullable (^AMPLocationInfoBlock)(void);
 /**
  Identifier for the current user.
  */
-@property (nonatomic, copy, readonly, nullable) NSString *userId;
+@property (nonatomic, copy, nullable) NSString *userId;
 
 /**
  Identifier for the current device.
  */
-@property (nonatomic, copy, readonly) NSString *deviceId;
+@property (nonatomic, copy) NSString *deviceId;
 
 /**
  Name of the SDK instance (ex: no name for default instance, or custom name for a named instance)
diff --git a/Sources/Amplitude/Amplitude.m b/Sources/Amplitude/Amplitude.m
index ac95656b..c56d65be 100644
--- a/Sources/Amplitude/Amplitude.m
+++ b/Sources/Amplitude/Amplitude.m
@@ -87,8 +87,6 @@ @interface Amplitude()
 @property (nonatomic, assign) long long sessionId;
 @property (nonatomic, assign) BOOL backoffUpload;
 @property (nonatomic, assign) int backoffUploadBatchSize;
-@property (nonatomic, copy, readwrite, nullable) NSString *userId;
-@property (nonatomic, copy, readwrite) NSString *deviceId;
 #if TARGET_OS_IOS || TARGET_OS_MACCATALYST
 @property (nonatomic, strong) AMPEventExplorer *eventExplorer;
 #endif