diff --git a/gridlock/draw.py b/gridlock/draw.py
index aa45200..2fb0b47 100644
--- a/gridlock/draw.py
+++ b/gridlock/draw.py
@@ -8,7 +8,6 @@ from numpy.typing import NDArray, ArrayLike
 from float_raster import raster
 
 from . import GridError
-from .base import GridBase
 from .position import GridPosMixin
 
 
diff --git a/gridlock/grid.py b/gridlock/grid.py
index 55b1abb..91f3c6b 100644
--- a/gridlock/grid.py
+++ b/gridlock/grid.py
@@ -9,7 +9,6 @@ import warnings
 import copy
 
 from . import GridError
-from .base import GridBase
 from .draw import GridDrawMixin
 from .read import GridReadMixin
 from .position import GridPosMixin
diff --git a/gridlock/read.py b/gridlock/read.py
index e82ffcc..0f46836 100644
--- a/gridlock/read.py
+++ b/gridlock/read.py
@@ -7,7 +7,6 @@ import numpy
 from numpy.typing import NDArray
 
 from . import GridError
-from .base import GridBase
 from .position import GridPosMixin
 
 if TYPE_CHECKING: