diff --git a/mlp/costs.py b/mlp/costs.py
index 9532af1..351980b 100644
--- a/mlp/costs.py
+++ b/mlp/costs.py
@@ -1,6 +1,6 @@
+# -*- coding: utf-8 -*-
 """Model costs."""
 
-
 import numpy as np
 
 
diff --git a/mlp/initialisers.py b/mlp/initialisers.py
index b9b1614..243adc2 100644
--- a/mlp/initialisers.py
+++ b/mlp/initialisers.py
@@ -5,8 +5,7 @@ This module defines classes to initialise the parameters in a layer.
 """
 
 import numpy as np
-
-DEFAULT_SEED = 123456  # Default random number generator seed if none provided.
+from mlp import DEFAULT_SEED
 
 
 class ConstantInit(object):
diff --git a/mlp/learning_rules.py b/mlp/learning_rules.py
index 4c771cd..2910800 100644
--- a/mlp/learning_rules.py
+++ b/mlp/learning_rules.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 """Learning rules."""
 
 import numpy as np
diff --git a/mlp/models.py b/mlp/models.py
index 18fff11..8649d35 100644
--- a/mlp/models.py
+++ b/mlp/models.py
@@ -1,6 +1,5 @@
-"""
-Model definitions.
-"""
+# -*- coding: utf-8 -*-
+"""Model definitions."""
 
 from mlp.layers import LayerWithParameters