diff --git a/FRP/FRPGalleryViewModel.h b/FRP/FRPGalleryViewModel.h
index 18844bc..053ae60 100644
--- a/FRP/FRPGalleryViewModel.h
+++ b/FRP/FRPGalleryViewModel.h
@@ -10,6 +10,6 @@
 
 @interface FRPGalleryViewModel : NSObject
 
-@property (nonatomic, strong) NSArray *photosArray;
+@property (nonatomic, readonly) NSArray *photosArray;
 
 @end
diff --git a/FRP/FRPGalleryViewModel.m b/FRP/FRPGalleryViewModel.m
index b4e7c89..78fad8f 100644
--- a/FRP/FRPGalleryViewModel.m
+++ b/FRP/FRPGalleryViewModel.m
@@ -11,6 +11,12 @@
 // Utilities
 #import "FRPPhotoImporter.h"
 
+@interface FRPGalleryViewModel ()
+
+@property (nonatomic, strong) NSArray *photosArray;
+
+@end
+
 @implementation FRPGalleryViewModel
 
 -(instancetype)init {