diff --git a/types/seamless-immutable/index.d.ts b/types/seamless-immutable/index.d.ts
index d3d2ef5b6a..b781523ef2 100644
--- a/types/seamless-immutable/index.d.ts
+++ b/types/seamless-immutable/index.d.ts
@@ -18,6 +18,10 @@ declare namespace SeamlessImmutable {
         merger?(a: any, b: any, config: any): any;
     }
 
+    interface ReplaceConfig {
+        deep: boolean;
+    }
+
     interface Options {
         prototype?: any;
     }
@@ -75,6 +79,8 @@ declare namespace SeamlessImmutable {
         without<K extends keyof T>(property: K): ImmutableObject<T>;
         without<K extends keyof T>(...properties: K[]): ImmutableObject<T>;
         without<K extends keyof T>(filter: (value: T[K], key: K) => boolean): ImmutableObject<T>;
+
+        replace<S>(valueObj: S, options?: ReplaceConfig): ImmutableObject<S>;
     }
 
     interface ImmutableArrayMixin<T> {
@@ -92,6 +98,8 @@ declare namespace SeamlessImmutable {
 
     function isImmutable(target: any): boolean;
     function ImmutableError(message: string): Error;
+
+    function replace<T, S>(obj: ImmutableObject<T>, valueObj: S, options?: ReplaceConfig): ImmutableObject<S>;
 }
 
 declare function SeamlessImmutable<T>(obj: T[], options?: SeamlessImmutable.Options): SeamlessImmutable.ImmutableArray<T>;
diff --git a/types/seamless-immutable/seamless-immutable-tests.ts b/types/seamless-immutable/seamless-immutable-tests.ts
index ddec87e81d..cccb2d7f96 100644
--- a/types/seamless-immutable/seamless-immutable-tests.ts
+++ b/types/seamless-immutable/seamless-immutable-tests.ts
@@ -44,6 +44,12 @@ interface ExtendedUser extends User {
 
 {
     const isImmutable: boolean = Immutable.isImmutable(Immutable.from([0, 2]));
+    const user1: Immutable.ImmutableObject<User> = Immutable.from({
+        firstName: 'Angry',
+        lastName: 'Monkey'
+    });
+    const replacedUser01 = Immutable.replace(user1, { firstName: 'Super', lastName: 'Monkey' });
+    const replacedUser02 = Immutable.replace(user1, { firstName: 'Super', lastName: 'Monkey' }, { deep: true });
 }
 
 //
@@ -124,4 +130,8 @@ interface ExtendedUser extends User {
     const firstNameWithDynamicPathWithDefault = immutableUser.getIn(['first' + 'name'], '');
     const line1WithoutDefault = immutableUserEx.getIn(['address', 'line1']);
     const line1WithDefault = immutableUserEx.getIn(['address', 'line1'], '');
+
+    // replace
+    const replacedUser01 = immutableUser.replace({ firstName: 'Super', lastName: 'Monkey' });
+    const replacedUser02 = immutableUser.replace({ firstName: 'Super', lastName: 'Monkey' }, { deep: true });
 }