diff --git a/lib/model.js b/lib/model.js
index 922360862b9..fb71f9ebc23 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -1529,6 +1529,50 @@ Model.createSearchIndex = async function createSearchIndex(description) {
   return await this.$__collection.createSearchIndex(description);
 };
 
+/**
+ * Update an existing [Atlas search index](https://www.mongodb.com/docs/atlas/atlas-search/create-index/).
+ * This function only works when connected to MongoDB Atlas.
+ *
+ * #### Example:
+ *
+ *     const schema = new Schema({ name: { type: String, unique: true } });
+ *     const Customer = mongoose.model('Customer', schema);
+ *     await Customer.updateSearchIndex('test', { mappings: { dynamic: true } });
+ *
+ * @param {String} name
+ * @param {Object} definition
+ * @return {Promise}
+ * @api public
+ */
+
+Model.updateSearchIndex = async function updateSearchIndex(name, definition) {
+  _checkContext(this, 'updateSearchIndex');
+
+  return await this.$__collection.updateSearchIndex(name, definition);
+};
+
+/**
+ * Delete an existing [Atlas search index](https://www.mongodb.com/docs/atlas/atlas-search/create-index/) by name.
+ * This function only works when connected to MongoDB Atlas.
+ *
+ * #### Example:
+ *
+ *     const schema = new Schema({ name: { type: String, unique: true } });
+ *     const Customer = mongoose.model('Customer', schema);
+ *     await Customer.dropSearchIndex('test');
+ *
+ * @param {String} name
+ * @param {Object} definition
+ * @return {Promise}
+ * @api public
+ */
+
+Model.dropSearchIndex = async function dropSearchIndex(name) {
+  _checkContext(this, 'dropSearchIndex');
+
+  return await this.$__collection.dropSearchIndex(name);
+};
+
 /**
  * Does a dry-run of `Model.syncIndexes()`, returning the indexes that `syncIndexes()` would drop and create if you were to run `syncIndexes()`.
  *
diff --git a/types/models.d.ts b/types/models.d.ts
index 22362d5dcde..946121823fc 100644
--- a/types/models.d.ts
+++ b/types/models.d.ts
@@ -300,6 +300,8 @@ declare module 'mongoose' {
       'deleteOne'
     >;
 
+    dropSearchIndex(name: string): Promise<void>;
+
     /**
      * Event emitter that reports any errors that occurred. Useful for global error
      * handling.
@@ -475,6 +477,8 @@ declare module 'mongoose' {
       doc: any, options: PopulateOptions | Array<PopulateOptions> | string
     ): Promise<MergeType<THydratedDocumentType, Paths>>;
 
+    updateSearchIndex(name: string, definition: AnyObject): Promise<void>;
+
     /** Casts and validates the given object against this model's schema, passing the given `context` to custom validators. */
     validate(): Promise<void>;
     validate(obj: any): Promise<void>;