diff --git a/trainers/base_trainer.py b/trainers/base_trainer.py
index dd19048..bc48e6a 100644
--- a/trainers/base_trainer.py
+++ b/trainers/base_trainer.py
@@ -1,10 +1,11 @@
 import torch
 from utils.plotting import plot_loss
 from utils.logging import log_to_csv
+from abc import ABC, abstractmethod
 import time
 
 
-class BaseTrainer():
+class BaseTrainer(ABC):
     def __init__(self, model, device):
         self.model = model
         self.device = device
@@ -37,6 +38,7 @@ def unfreeze_all_layers(self) -> None:
         for param in self.model.parameters():
             param.requires_grad = True
 
+    @abstractmethod
     def _train_epoch(self, train_loader, epoch, num_epochs, verbose=True) -> float:
         """ Train the model for one epoch. """
         raise NotImplementedError(