diff --git a/source/pytorch.js b/source/pytorch.js
index 11d713dd2f..8bfe8d2587 100644
--- a/source/pytorch.js
+++ b/source/pytorch.js
@@ -3532,13 +3532,18 @@ pytorch.Utility = class {
                     if (value && value.__class__ && value.__class__.__module__ === 'datetime' && value.__class__.__name__ === 'datetime') {
                         continue;
                     }
+                    if (value && Number.isInteger(value.epoch) && value.state_dict) {
+                        target[key] = value.state_dict;
+                        continue;
+                    }
                     if ((key.startsWith('dico_') && Object(value) === value) ||
                         (key.startsWith('best_metrics') && Object(value) === value) ||
                         (key === 'args' && Object(value) === value) ||
                         (key.startsWith('params') && Object(value) === value && (value.id2lang || value.lang2id)) ||
                         (key.startsWith('spk_dict_') && Object(value) === value && Object.keys(value).length === 0) ||
                         (key === 'blk_det') ||
-                        (key === 'random_state')) {
+                        (key === 'random_state') ||
+                        (key === 'train_cfg' || key === 'test_cfg' || key === '_is_full_backward_hook')) {
                         continue;
                     }
                     target[key] = value;
@@ -3588,22 +3593,22 @@ pytorch.Utility = class {
             if (Object(obj) !== obj) {
                 return null;
             }
-            const map = new Map(Object.keys(obj).map((key) => [ key, obj[key] ]));
+            const map = new Map(Object.entries(obj).map((entry) => [ entry[0], entry[1] ]));
             if (validate(map)) {
                 return map;
             }
-            map.clear();
-            for (const key of Object.keys(obj)) {
-                const value = flatten(obj[key]);
+            const target = new Map();
+            for (const entry of map) {
+                const value = flatten(entry[1]);
                 if (value && value instanceof Map) {
                     for (const pair of value) {
-                        map.set(key + '.' + pair[0], pair[1]);
+                        target.set(entry[0] + '.' + pair[0], pair[1]);
                     }
                     continue;
                 }
                 return null;
             }
-            return map;
+            return target;
         };
         if (!obj) {
             return null;