diff --git a/Sources/Classes/RSDefaultsPersistence.m b/Sources/Classes/RSDefaultsPersistence.m
index a63db911..523d90c5 100644
--- a/Sources/Classes/RSDefaultsPersistence.m
+++ b/Sources/Classes/RSDefaultsPersistence.m
@@ -10,11 +10,11 @@
 #import "RSLogger.h"
 #import "RSDefaultsPersistence.h"
 
-@implementation RSDefaultsPersistence
-
 static RSDefaultsPersistence *instance;
 static NSString * const userDefaultsCopied = @"userDefaultsCopied";
 
+@implementation RSDefaultsPersistence
+
 + (instancetype)sharedInstance {
     if(instance == nil) {
         static dispatch_once_t onceToken;
diff --git a/Sources/Classes/RSUtils.m b/Sources/Classes/RSUtils.m
index aee9bc47..e29ded6c 100644
--- a/Sources/Classes/RSUtils.m
+++ b/Sources/Classes/RSUtils.m
@@ -58,7 +58,11 @@ + (BOOL)isFileExists:(NSString *)fileName {
 }
 
 + (BOOL)doesFileExistsAtURL:(NSURL *)fileURL {
-    return [[NSFileManager defaultManager] fileExistsAtPath:[fileURL path]];
+    NSString* filePath = [fileURL path];
+    if(filePath != nil) {
+        return [[NSFileManager defaultManager] fileExistsAtPath:filePath];
+    }
+    return NO;
 }
 
 + (BOOL)removeFile:(NSString *)fileName {