diff --git a/RMStore/Optional/RMStoreUserDefaultsPersistence.h b/RMStore/Optional/RMStoreUserDefaultsPersistence.h
index 45f1fa0d..01cf6261 100644
--- a/RMStore/Optional/RMStoreUserDefaultsPersistence.h
+++ b/RMStore/Optional/RMStoreUserDefaultsPersistence.h
@@ -26,6 +26,10 @@
  */
 @interface RMStoreUserDefaultsPersistence : NSObject<RMStoreTransactionPersistor>
 
+/** Returns the user defaults used to store transaction data
+ */
+- (NSUserDefaults*)userDefaults;
+
 /** Remove all transactions from user defaults.
  */
 - (void)removeTransactions;
@@ -78,4 +82,4 @@
  */
 - (RMStoreTransaction*)transactionWithData:(NSData*)data;
 
-@end
\ No newline at end of file
+@end
diff --git a/RMStore/RMStore.m b/RMStore/RMStore.m
index 01388b12..c27d9edc 100755
--- a/RMStore/RMStore.m
+++ b/RMStore/RMStore.m
@@ -108,16 +108,16 @@ - (NSArray*)rm_transactions {
 
 @interface RMProductsRequestDelegate : NSObject<SKProductsRequestDelegate>
 
-@property (nonatomic, strong) RMSKProductsRequestSuccessBlock successBlock;
-@property (nonatomic, strong) RMSKProductsRequestFailureBlock failureBlock;
+@property (nonatomic, copy) RMSKProductsRequestSuccessBlock successBlock;
+@property (nonatomic, copy) RMSKProductsRequestFailureBlock failureBlock;
 @property (nonatomic, weak) RMStore *store;
 
 @end
 
 @interface RMAddPaymentParameters : NSObject
 
-@property (nonatomic, strong) RMSKPaymentTransactionSuccessBlock successBlock;
-@property (nonatomic, strong) RMSKPaymentTransactionFailureBlock failureBlock;
+@property (nonatomic, copy) RMSKPaymentTransactionSuccessBlock successBlock;
+@property (nonatomic, copy) RMSKPaymentTransactionFailureBlock failureBlock;
 
 @end
 
diff --git a/RMStoreTests/RMProducstRequestDelegateTests.m b/RMStoreTests/RMProducstRequestDelegateTests.m
index bcab5f17..3ae0fe59 100644
--- a/RMStoreTests/RMProducstRequestDelegateTests.m
+++ b/RMStoreTests/RMProducstRequestDelegateTests.m
@@ -25,8 +25,8 @@
 
 @interface RMProductsRequestDelegate : NSObject<SKProductsRequestDelegate>
 
-@property (nonatomic, strong) RMSKProductsRequestSuccessBlock successBlock;
-@property (nonatomic, strong) RMSKProductsRequestFailureBlock failureBlock;
+@property (nonatomic, copy) RMSKProductsRequestSuccessBlock successBlock;
+@property (nonatomic, copy) RMSKProductsRequestFailureBlock failureBlock;
 @property (nonatomic, weak) RMStore *store;
 
 @end