diff --git a/pyod/models/gaal_base.py b/pyod/models/gaal_base.py
index a0610be3..5af2e70e 100644
--- a/pyod/models/gaal_base.py
+++ b/pyod/models/gaal_base.py
@@ -8,12 +8,10 @@
 
 try:
     import torch
-except ImportError:
-    print('please install torch first')
-
-import torch
-import torch.nn as nn
-import torch.nn.functional as F
+    import torch.nn as nn
+    import torch.nn.functional as F
+except ImportError as e:
+    raise ImportError('PyTorch is required for GAAL models. Please install it with `pip install torch`.') from e
 
 
 def create_discriminator(latent_size, data_size):