diff --git a/ACSideslipTransition/ACSideslipTransition/ACSideslipConstants.h b/ACSideslipTransition/ACSideslipTransition/ACSideslipConstants.h
index 369a171..d954d1a 100755
--- a/ACSideslipTransition/ACSideslipTransition/ACSideslipConstants.h
+++ b/ACSideslipTransition/ACSideslipTransition/ACSideslipConstants.h
@@ -20,4 +20,6 @@ static CGFloat const ACST_SwipeShouldFinishDismissPercent       = 0.5;
 static CGFloat const ACST_SwipeFinishDismissDuration            = 0.1 / ACST_SwipeShouldFinishDismissPercent;
 static CGFloat const ACST_SwipeCancleDismissDuration            = 0.3 / ACST_SwipeShouldFinishDismissPercent;
 
+#import "UIViewController+ACSideslip.h"
+
 #endif
diff --git a/ACSideslipTransition/ACSideslipTransition/ACSideslipDismissAnimation.m b/ACSideslipTransition/ACSideslipTransition/ACSideslipDismissAnimation.m
index 522c208..13d650d 100644
--- a/ACSideslipTransition/ACSideslipTransition/ACSideslipDismissAnimation.m
+++ b/ACSideslipTransition/ACSideslipTransition/ACSideslipDismissAnimation.m
@@ -105,7 +105,9 @@ - (void)animateTransition:(id <UIViewControllerContextTransitioning>)transitionC
     } completion:^(BOOL finished) {
         self.blackMask.hidden = YES;
         self.shadowMask.hidden = YES;
+        
         [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
+        [backVC ac_removeTransitionObject];
     }];
 }
 
diff --git a/ACSideslipTransition/ACSideslipTransition/ACSideslipSwipeInteractiveTransition.m b/ACSideslipTransition/ACSideslipTransition/ACSideslipSwipeInteractiveTransition.m
index b1289d0..2fb3dc6 100644
--- a/ACSideslipTransition/ACSideslipTransition/ACSideslipSwipeInteractiveTransition.m
+++ b/ACSideslipTransition/ACSideslipTransition/ACSideslipSwipeInteractiveTransition.m
@@ -312,7 +312,9 @@ - (void)finishTranslationAnimationWithDuration:(NSTimeInterval)duration
     } completion:^(BOOL finished) {
         self.blackMask.hidden = YES;
         self.shadowMask.hidden = YES;
+        
         [self.context completeTransition:YES];
+        [backVC ac_removeTransitionObject];
     }];
     
     if (self.finishDelegate && [self.finishDelegate respondsToSelector:@selector(swipeInteractiveTransitionDidFinished)])
diff --git a/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.h b/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.h
index 8362a18..cd0008b 100644
--- a/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.h
+++ b/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.h
@@ -18,4 +18,6 @@
 
 - (void)ac_sideslip:(UIViewController * __nonnull)newVC completion:(void (^ __nullable)(void))completion;
 
+- (void)ac_removeTransitionObject;
+
 @end
diff --git a/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.m b/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.m
index 3ce2428..5767316 100644
--- a/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.m
+++ b/ACSideslipTransition/ACSideslipTransition/UIViewController+ACSideslip.m
@@ -30,8 +30,24 @@ - (void)ac_sideslip:(UIViewController * __nonnull)newVC completion:(void (^ __nu
     [sideslipTransitionObject sideslip:newVC from:self completion:completion];
 }
 
+- (void)ac_removeTransitionObject {
+    ACSideslipTransition *sideslipTransitionObject = [self ac_sideslipTransitionObject];
+    if (sideslipTransitionObject) {
+        objc_setAssociatedObject(self,
+                                 kACSideslipTransitionObjectKey,
+                                 nil,
+                                 OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+        sideslipTransitionObject = nil;
+    }
+}
+
 #pragma mark - Associated Properties
 
+- (ACSideslipTransition *)ac_sideslipTransitionObject {
+    ACSideslipTransition *sideslipTransitionObject = objc_getAssociatedObject(self, kACSideslipTransitionObjectKey);
+    return sideslipTransitionObject;
+}
+
 - (void)ac_setSideslipTransitionObject:(ACSideslipTransition *)sideslipTransitionObject {
     objc_setAssociatedObject(self,
                              kACSideslipTransitionObjectKey,
@@ -39,9 +55,6 @@ - (void)ac_setSideslipTransitionObject:(ACSideslipTransition *)sideslipTransitio
                              OBJC_ASSOCIATION_RETAIN_NONATOMIC);
 }
 
-- (ACSideslipTransition *)ac_sideslipTransitionObject {
-    ACSideslipTransition *sideslipTransitionObject = objc_getAssociatedObject(self, kACSideslipTransitionObjectKey);
-    return sideslipTransitionObject;
-}
+
 
 @end
diff --git a/ACSideslipTransition/SecondViewController.m b/ACSideslipTransition/SecondViewController.m
index c31a0a4..0e36859 100644
--- a/ACSideslipTransition/SecondViewController.m
+++ b/ACSideslipTransition/SecondViewController.m
@@ -19,6 +19,11 @@ @interface SecondViewController () <ACSideslipSwipeInteractiveTransitionFinished
 
 @implementation SecondViewController
 
+- (void)dealloc
+{
+    NSLog(@"dealloc SecondViewController");
+}
+
 #pragma mark - ACSideslipSwipeInteractiveTransitionFinishedDelegate
 
 - (void)swipeInteractiveTransitionDidFinished