diff --git a/MFSideMenu/MFSideMenuContainerViewController.h b/MFSideMenu/MFSideMenuContainerViewController.h
index 0537f1a..23ec4ee 100644
--- a/MFSideMenu/MFSideMenuContainerViewController.h
+++ b/MFSideMenu/MFSideMenuContainerViewController.h
@@ -34,9 +34,9 @@ typedef enum {
 
 @interface MFSideMenuContainerViewController : UIViewController<UIGestureRecognizerDelegate>
 
-+ (MFSideMenuContainerViewController *)containerWithCenterViewController:(id)centerViewController
-                                                  leftMenuViewController:(id)leftMenuViewController
-                                                 rightMenuViewController:(id)rightMenuViewController;
++ (instancetype)containerWithCenterViewController:(id)centerViewController
+                             leftMenuViewController:(id)leftMenuViewController
+                            rightMenuViewController:(id)rightMenuViewController;
 
 @property (nonatomic, strong) id centerViewController;
 @property (nonatomic, strong) UIViewController *leftMenuViewController;
diff --git a/MFSideMenu/MFSideMenuContainerViewController.m b/MFSideMenu/MFSideMenuContainerViewController.m
index 70216e0..ecf7a1b 100644
--- a/MFSideMenu/MFSideMenuContainerViewController.m
+++ b/MFSideMenu/MFSideMenuContainerViewController.m
@@ -50,10 +50,10 @@ @implementation MFSideMenuContainerViewController
 #pragma mark -
 #pragma mark - Initialization
 
-+ (MFSideMenuContainerViewController *)containerWithCenterViewController:(id)centerViewController
-                                                  leftMenuViewController:(id)leftMenuViewController
-                                                 rightMenuViewController:(id)rightMenuViewController {
-    MFSideMenuContainerViewController *controller = [MFSideMenuContainerViewController new];
++ (instancetype)containerWithCenterViewController:(id)centerViewController
+                           leftMenuViewController:(id)leftMenuViewController
+                          rightMenuViewController:(id)rightMenuViewController {
+    MFSideMenuContainerViewController *controller = [[self alloc] init];
     controller.leftMenuViewController = leftMenuViewController;
     controller.centerViewController = centerViewController;
     controller.rightMenuViewController = rightMenuViewController;
diff --git a/MFSideMenu/MFSideMenuShadow.h b/MFSideMenu/MFSideMenuShadow.h
index 05cdc26..94805f2 100644
--- a/MFSideMenu/MFSideMenuShadow.h
+++ b/MFSideMenu/MFSideMenuShadow.h
@@ -16,8 +16,8 @@
 @property (nonatomic, strong) UIColor *color;
 @property (nonatomic, assign) UIView *shadowedView;
 
-+ (MFSideMenuShadow *)shadowWithView:(UIView *)shadowedView;
-+ (MFSideMenuShadow *)shadowWithColor:(UIColor *)color radius:(CGFloat)radius opacity:(CGFloat)opacity;
++ (instancetype)shadowWithView:(UIView *)shadowedView;
++ (instancetype)shadowWithColor:(UIColor *)color radius:(CGFloat)radius opacity:(CGFloat)opacity;
 
 - (void)draw;
 - (void)shadowedViewWillRotate;
diff --git a/MFSideMenu/MFSideMenuShadow.m b/MFSideMenu/MFSideMenuShadow.m
index 37839ad..c22066d 100644
--- a/MFSideMenu/MFSideMenuShadow.m
+++ b/MFSideMenu/MFSideMenuShadow.m
@@ -17,14 +17,14 @@ @implementation MFSideMenuShadow
 @synthesize enabled = _enabled;
 @synthesize shadowedView;
 
-+ (MFSideMenuShadow *)shadowWithView:(UIView *)shadowedView {
-    MFSideMenuShadow *shadow = [MFSideMenuShadow shadowWithColor:[UIColor blackColor] radius:10.0f opacity:0.75f];
++ (instancetype)shadowWithView:(UIView *)shadowedView {
+    MFSideMenuShadow *shadow = [self shadowWithColor:[UIColor blackColor] radius:10.0f opacity:0.75f];
     shadow.shadowedView = shadowedView;
     return shadow;
 }
 
-+ (MFSideMenuShadow *)shadowWithColor:(UIColor *)color radius:(CGFloat)radius opacity:(CGFloat)opacity {
-    MFSideMenuShadow *shadow = [MFSideMenuShadow new];
++ (instancetype)shadowWithColor:(UIColor *)color radius:(CGFloat)radius opacity:(CGFloat)opacity {
+    MFSideMenuShadow *shadow = [[self alloc] init];
     shadow.color = color;
     shadow.radius = radius;
     shadow.opacity = opacity;