diff --git a/sudoku/sudoku.py b/sudoku/sudoku.py
index a761979..00d6de7 100644
--- a/sudoku/sudoku.py
+++ b/sudoku/sudoku.py
@@ -183,7 +183,7 @@ class Sudoku:
     _empty_cell_value = None # type: None
     __difficulty = None # type: float
 
-    def __init__(self, width = 3, height = None, board = None, difficulty = None, seed = randrange(sys.maxsize)):
+    def __init__(self, width = 3, height = None, board = None, difficulty = None, seed = None):
         # type: (int, Optional[int], Optional[Iterable[Iterable[Optional[int]]]], Optional[float], int) -> None
         """
         Initializes a Sudoku board
@@ -192,7 +192,7 @@ def __init__(self, width = 3, height = None, board = None, difficulty = None, se
         :param height: Optional integer representing the height of the Sudoku grid. If not provided, defaults to the value of `width`.
         :param board: Optional iterable for a the initial state of the Sudoku board.
         :param difficulty: Optional float representing the difficulty level of the Sudoku puzzle. If provided, sets the difficulty level based on the number of empty cells. Defaults to None.
-        :param seed: Integer representing the seed for the random number generator used to generate the board. Defaults to a random seed within the system's maximum size.
+        :param seed: Integer representing the seed for the random number generator used to generate the board. Defaults to a runtime-generated random seed within the system's maximum size.
 
         :raises AssertionError: If the width, height, or size of the board is invalid.
         """
@@ -204,6 +204,10 @@ def __init__(self, width = 3, height = None, board = None, difficulty = None, se
         assert self.height > 0, 'Height cannot be less than 1'
         assert self.size > 1, 'Board size cannot be 1 x 1'
 
+        if seed is None:
+            # Generate a fresh random seed every time this is called unless the user explicitly provides it
+            seed = randrange(sys.maxsize)
+
         if difficulty is not None:
             self.__difficulty = difficulty
 
@@ -390,7 +394,7 @@ def __str__(self):
 class DiagonalSudoku(Sudoku):
     __difficulty = None # type: float
 
-    def __init__(self, size = 3, board = None, difficulty = None, seed = randrange(sys.maxsize)):
+    def __init__(self, size = 3, board = None, difficulty = None, seed = None):
         # type: (int, Optional[Iterable[Iterable[Optional[int]]]], Optional[float], int) -> None
         self.width = size
         self.height = size
@@ -403,6 +407,10 @@ def __init__(self, size = 3, board = None, difficulty = None, seed = randrange(s
         assert self.height > 0, 'Height cannot be less than 1'
         assert self.size > 1, 'Board size cannot be 1 x 1'
 
+        if seed is None:
+            # Generate a fresh random seed every time this is called unless the user explicitly provides it
+            seed = randrange(sys.maxsize)
+
         if difficulty is not None:
             self.__difficulty = difficulty