diff --git a/utils.py b/utils.py
index 0b2b07e..fd2df67 100644
--- a/utils.py
+++ b/utils.py
@@ -29,7 +29,9 @@ def load_checkpoint(config, model, optimizer, lr_scheduler, logger):
     if not config.EVAL_MODE and 'optimizer' in checkpoint and 'lr_scheduler' in checkpoint and 'epoch' in checkpoint:
         optimizer.load_state_dict(checkpoint['optimizer'])
         lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])
+        config.defrost()
         config.TRAIN.START_EPOCH = checkpoint['epoch'] + 1
+        config.freeze()
         if 'amp' in checkpoint and config.AMP_OPT_LEVEL != "O0" and checkpoint['config'].AMP_OPT_LEVEL != "O0":
             amp.load_state_dict(checkpoint['amp'])
         logger.info(f"=> loaded successfully '{config.MODEL.RESUME}' (epoch {checkpoint['epoch']})")