diff --git a/LBYouTubeView/LBYouTubeExtractor.m b/LBYouTubeView/LBYouTubeExtractor.m
index 1906258..1048b6d 100644
--- a/LBYouTubeView/LBYouTubeExtractor.m
+++ b/LBYouTubeView/LBYouTubeExtractor.m
@@ -126,7 +126,8 @@ -(NSURL*)extractYouTubeURLFromFile:(NSString *)html error:(NSError *__autoreleas
 		
         // Check the signature:
 		if ([sigs count] > 0) {
-			sigCheckingResult = [sigs objectAtIndex:index];
+            unsigned int idx = MIN(index,sigs.count-1);
+			sigCheckingResult = [sigs objectAtIndex:idx];
             NSString* encrSyg = [string substringWithRange:sigCheckingResult.range];
             
             sig_regex = [[NSRegularExpression alloc] initWithPattern:@"(?<=sig\\\\\": \\\\\")[^\"]*?(?=\\\\\")" options:NSRegularExpressionCaseInsensitive error:nil];