diff --git a/.gitignore b/.gitignore
index 60d4206ad..494e05929 100644
--- a/.gitignore
+++ b/.gitignore
@@ -85,3 +85,4 @@ _version.py
 .env
 ows_refactored/
 local_cfg/
+.mypy_cache/
diff --git a/datacube_ows/styles/ramp.py b/datacube_ows/styles/ramp.py
index daa59c359..16833e5f4 100644
--- a/datacube_ows/styles/ramp.py
+++ b/datacube_ows/styles/ramp.py
@@ -16,13 +16,17 @@
 from colour import Color
 from matplotlib import pyplot as plt
 from matplotlib.colors import LinearSegmentedColormap, to_hex
-from numpy.typing import NDArray
-from xarray import Dataset
+
+try:
+    from numpy.typing import NDArray
+except ImportError:
+    NDArray = numpy.ndarray
 
 from datacube_ows.config_utils import CFG_DICT
 from datacube_ows.ogc_utils import ConfigException, FunctionWrapper
 from datacube_ows.styles.base import StyleDefBase
 from datacube_ows.styles.expression import Expression
+from xarray import Dataset
 
 _LOG = logging.getLogger(__name__)
 matplotlib.use('Agg')
diff --git a/setup.py b/setup.py
index e15248950..1020afe7e 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@
     'deepdiff',
     'matplotlib',
     'pyparsing>=2.2.1,<3',  # resolving dependency conflict between matplotlib and packaging
-    'numpy>=1.21.1',
+    'numpy',
     'scipy',
     'Pillow',
     'Babel',