diff --git a/Sources/AttributeProtocol.swift b/Sources/AttributeProtocol.swift
index 37aa359..df70185 100644
--- a/Sources/AttributeProtocol.swift
+++ b/Sources/AttributeProtocol.swift
@@ -43,5 +43,5 @@ internal protocol AttributeProtocol: PropertyProtocol {
     var rawObject: CoreStoreManagedObject? { get set }
     var getter: CoreStoreManagedObject.CustomGetter? { get }
     var setter: CoreStoreManagedObject.CustomSetter? { get }
-    var valueForSnapshot: Any { get }
+    var valueForSnapshot: Any? { get }
 }
diff --git a/Sources/DiffableDataSource.CollectionView-UIKit.swift b/Sources/DiffableDataSource.CollectionView-UIKit.swift
index 985905f..04943f0 100644
--- a/Sources/DiffableDataSource.CollectionView-UIKit.swift
+++ b/Sources/DiffableDataSource.CollectionView-UIKit.swift
@@ -120,7 +120,7 @@ extension DiffableDataSource {
 
             let diffableSnapshot = snapshot.diffableSnapshot
             self.dispatcher.apply(
-                diffableSnapshot as! Internals.DiffableDataSourceSnapshot,
+                diffableSnapshot,
                 view: self.collectionView,
                 animatingDifferences: animatingDifferences,
                 performUpdates: { collectionView, changeset, setSections in
diff --git a/Sources/ObjectPublisher.swift b/Sources/ObjectPublisher.swift
index 7412fc1..ce2cfde 100644
--- a/Sources/ObjectPublisher.swift
+++ b/Sources/ObjectPublisher.swift
@@ -356,7 +356,7 @@ extension ObjectPublisher where O: NSManagedObject {
     public func value<V: AllowedObjectiveCKeyPathValue>(forKeyPath keyPath: KeyPath<O, V>) -> V! {
 
         let key = String(keyPath: keyPath)
-        return self.snapshot?.dictionaryForValues()[key] as? V
+        return self.snapshot?.dictionaryForValues()[key] as! V?
     }
 }
 
diff --git a/Sources/ObjectSnapshot.swift b/Sources/ObjectSnapshot.swift
index 259c536..f01cbff 100644
--- a/Sources/ObjectSnapshot.swift
+++ b/Sources/ObjectSnapshot.swift
@@ -157,7 +157,7 @@ extension ObjectSnapshot where O: NSManagedObject {
     public func value<V: AllowedObjectiveCKeyPathValue>(forKeyPath keyPath: KeyPath<O, V>) -> V! {
 
         let key = String(keyPath: keyPath)
-        return self.values[key] as? V
+        return self.values[key] as! V?
     }
 
     /**
diff --git a/Sources/PartialObject.swift b/Sources/PartialObject.swift
index 82f8731..9d42664 100644
--- a/Sources/PartialObject.swift
+++ b/Sources/PartialObject.swift
@@ -191,7 +191,7 @@ public struct PartialObject<O: CoreStoreObject> {
      */
     public func value<V>(for property: (O) -> TransformableContainer<O>.Optional<V>) -> V? {
         
-        return self.rawObject.value(forKey: property(O.meta).keyPath) as? V
+        return self.rawObject.value(forKey: property(O.meta).keyPath) as! V?
     }
     
     /**
@@ -212,7 +212,7 @@ public struct PartialObject<O: CoreStoreObject> {
      */
     public func primitiveValue<V>(for property: (O) -> TransformableContainer<O>.Optional<V>) -> V? {
         
-        return self.rawObject.primitiveValue(forKey: property(O.meta).keyPath) as? V
+        return self.rawObject.primitiveValue(forKey: property(O.meta).keyPath) as! V?
     }
     
     /**
diff --git a/Sources/Relationship.swift b/Sources/Relationship.swift
index 120a799..74c72d5 100644
--- a/Sources/Relationship.swift
+++ b/Sources/Relationship.swift
@@ -313,9 +313,9 @@ public enum RelationshipContainer<O: CoreStoreObject> {
             }
         }
 
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return self.value?.objectID() as Any
+            return self.value?.objectID()
         }
         
         
@@ -609,9 +609,9 @@ public enum RelationshipContainer<O: CoreStoreObject> {
             }
         }
 
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return self.value.map({ $0.objectID() }) as Any
+            return self.value.map({ $0.objectID() })
         }
         
         
@@ -910,9 +910,9 @@ public enum RelationshipContainer<O: CoreStoreObject> {
             }
         }
 
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return Set(self.value.map({ $0.objectID() })) as Any
+            return Set(self.value.map({ $0.objectID() }))
         }
         
         
diff --git a/Sources/RelationshipProtocol.swift b/Sources/RelationshipProtocol.swift
index b2269a5..0f53b88 100644
--- a/Sources/RelationshipProtocol.swift
+++ b/Sources/RelationshipProtocol.swift
@@ -41,5 +41,5 @@ internal protocol RelationshipProtocol: PropertyProtocol {
     var renamingIdentifier: () -> String? { get }
     var minCount: Int { get }
     var maxCount: Int { get }
-    var valueForSnapshot: Any { get }
+    var valueForSnapshot: Any? { get }
 }
diff --git a/Sources/Transformable.swift b/Sources/Transformable.swift
index 182f0bc..5129047 100644
--- a/Sources/Transformable.swift
+++ b/Sources/Transformable.swift
@@ -272,9 +272,9 @@ public enum TransformableContainer<O: CoreStoreObject> {
             }
         }
         
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return self.value as Any
+            return self.value
         }
 
 
@@ -380,7 +380,7 @@ public enum TransformableContainer<O: CoreStoreObject> {
 
                         return customGetter(PartialObject<O>(object))
                     }
-                    return object.value(forKey: self.keyPath) as? V
+                    return object.value(forKey: self.keyPath) as! V?
                 }
             }
             set {
@@ -489,14 +489,14 @@ public enum TransformableContainer<O: CoreStoreObject> {
                 }
                 customSetter(
                     PartialObject<O>(rawObject),
-                    newValue as? V
+                    newValue as! V?
                 )
             }
         }
         
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
             
-            return self.value as Any
+            return self.value
         }
 
 
diff --git a/Sources/Value.swift b/Sources/Value.swift
index fec2e9a..2bd6cef 100644
--- a/Sources/Value.swift
+++ b/Sources/Value.swift
@@ -267,9 +267,9 @@ public enum ValueContainer<O: CoreStoreObject> {
             }
         }
         
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return self.value as Any
+            return self.value
         }
         
         
@@ -489,9 +489,9 @@ public enum ValueContainer<O: CoreStoreObject> {
             }
         }
         
-        internal var valueForSnapshot: Any {
+        internal var valueForSnapshot: Any? {
 
-            return self.value as Any
+            return self.value
         }