diff --git a/types/mongodb/index.d.ts b/types/mongodb/index.d.ts
index 999bd5989a..feb12923aa 100644
--- a/types/mongodb/index.d.ts
+++ b/types/mongodb/index.d.ts
@@ -886,9 +886,9 @@ export interface Collection<TSchema = Default> {
     findOneAndReplace(filter: FilterQuery<TSchema>, replacement: Object, options?: FindOneAndReplaceOption): Promise<FindAndModifyWriteOpResultObject<TSchema>>;
     findOneAndReplace(filter: FilterQuery<TSchema>, replacement: Object, options: FindOneAndReplaceOption, callback: MongoCallback<FindAndModifyWriteOpResultObject<TSchema>>): void;
     /** http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#findOneAndUpdate */
-    findOneAndUpdate(filter: FilterQuery<TSchema>, update: Object, callback: MongoCallback<FindAndModifyWriteOpResultObject<TSchema>>): void;
-    findOneAndUpdate(filter: FilterQuery<TSchema>, update: Object, options?: FindOneAndUpdateOption): Promise<FindAndModifyWriteOpResultObject<TSchema>>;
-    findOneAndUpdate(filter: FilterQuery<TSchema>, update: Object, options: FindOneAndUpdateOption, callback: MongoCallback<FindAndModifyWriteOpResultObject<TSchema>>): void;
+    findOneAndUpdate(filter: FilterQuery<TSchema>, update: UpdateQuery<TSchema> | TSchema, callback: MongoCallback<FindAndModifyWriteOpResultObject<TSchema>>): void;
+    findOneAndUpdate(filter: FilterQuery<TSchema>, update: UpdateQuery<TSchema> | TSchema, options?: FindOneAndUpdateOption): Promise<FindAndModifyWriteOpResultObject<TSchema>>;
+    findOneAndUpdate(filter: FilterQuery<TSchema>, update: UpdateQuery<TSchema> | TSchema, options: FindOneAndUpdateOption, callback: MongoCallback<FindAndModifyWriteOpResultObject<TSchema>>): void;
     /** http://mongodb.github.io/node-mongodb-native/3.1/api/Collection.html#geoHaystackSearch */
     geoHaystackSearch(x: number, y: number, callback: MongoCallback<any>): void;
     geoHaystackSearch(x: number, y: number, options?: GeoHaystackSearchOptions): Promise<any>;