diff --git a/lib/model.js b/lib/model.js
index 3929413e76..d00ac2cd1e 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -357,7 +357,12 @@ Model.prototype.$__handleSave = function(options, callback) {
   }
   if (this.$isNew) {
     // send entire doc
-    const obj = this.toObject(saveToObjectOptions);
+    let obj;
+    // Always use toObject for serialization; control minimize via options
+    saveToObjectOptions = Object.assign({}, saveToObjectOptions, {
+      minimize: this.$__schema.options.minimize
+    });
+    obj = this.toObject(saveToObjectOptions);
     if ((obj || {})._id === void 0) {
       // documents must have an _id else mongoose won't know
       // what to update later if more changes are made. the user
@@ -5194,4 +5199,4 @@ function _getContexts(hook) {
  * Module exports.
  */
 
-module.exports = exports = Model;
+module.exports = Model;
\ No newline at end of file
diff --git a/package.json b/package.json
index 8261ba39fe..83cb09006f 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "bson": "^6.10.4",
     "kareem": "2.6.3",
     "mongodb": "~6.20.0",
+    "mongoose": "^8.19.3",
     "mpath": "0.9.0",
     "mquery": "5.0.0",
     "ms": "2.1.3",
diff --git a/types/document.d.ts b/types/document.d.ts
index 8e5f5824a4..849d92a973 100644
--- a/types/document.d.ts
+++ b/types/document.d.ts
@@ -302,4 +302,4 @@ declare module 'mongoose' {
     validateSync<T extends keyof DocType>(pathsToValidate?: T | T[], options?: AnyObject): Error.ValidationError | null;
     validateSync(pathsToValidate?: pathsToValidate, options?: AnyObject): Error.ValidationError | null;
   }
-}
+}
\ No newline at end of file
diff --git a/types/index.d.ts b/types/index.d.ts
index 8e8b5ad67f..bac5572dc7 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -931,4 +931,4 @@ declare module 'mongoose' {
   export function skipMiddlewareFunction(val: any): Kareem.SkipWrappedFunction;
 
   export default mongoose;
-}
+}
\ No newline at end of file