diff --git a/DTCollectionViewManager.podspec b/DTCollectionViewManager.podspec
index 415a910..0f0ed42 100644
--- a/DTCollectionViewManager.podspec
+++ b/DTCollectionViewManager.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'DTCollectionViewManager'
-  s.version  = '2.6.1'
+  s.version  = '2.6.2'
   s.license  = 'MIT'
   s.summary  = 'The most simple and robust way to manage UICollectionView.'
   s.homepage = 'https://github.com/DenHeadless/DTCollectionViewManager'
diff --git a/DTCollectionViewManager/DTCollectionViewFactory.m b/DTCollectionViewManager/DTCollectionViewFactory.m
index b91eaa4..383ddf5 100644
--- a/DTCollectionViewManager/DTCollectionViewFactory.m
+++ b/DTCollectionViewManager/DTCollectionViewFactory.m
@@ -81,8 +81,7 @@ - (void)registerCellClass:(Class)cellClass forModelClass:(Class)modelClass
 
 - (void)registerNibNamed:(NSString *)nibName forCellClass:(Class)cellClass forModelClass:(Class)modelClass
 {
-    BOOL nibExists = [self nibExistsWithNibName:nibName];
-    NSParameterAssert(nibExists);
+    NSParameterAssert([self nibExistsWithNibName:nibName]);
     
     [[self.delegate collectionView] registerNib:[UINib nibWithNibName:nibName bundle:nil]
                      forCellWithReuseIdentifier:[self reuseIdentifierFromClass:cellClass]];
@@ -112,9 +111,7 @@ - (void)registerNibNamed:(NSString *)nibName
                  forKind:(NSString *)kind
            forModelClass:(Class)modelClass
 {
-    BOOL nibExists = [self nibExistsWithNibName:nibName];
-    
-    NSParameterAssert(nibExists);
+    NSParameterAssert([self nibExistsWithNibName:nibName]);
     
     [[self.delegate collectionView] registerNib:[UINib nibWithNibName:nibName
                                                                bundle:nil]