diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b138f88..cb027c6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         os: [windows-latest, ubuntu-latest, macos-latest]
 
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index 70ba475..25d924e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "xpublish_wms"
 authors = [{ name = "Matthew Iannucci", email = "matt.iannucci@rpsgroup.com" }]
 description = "WMS plugin for xpublish"
 readme = "README.md"
-requires-python = ">=3.9,<3.12"
+requires-python = ">=3.9,<3.13"
 keywords = ["xarray", "xpublish", "wms"]
 license = { file = "LICENSE.txt" }
 
diff --git a/requirements.txt b/requirements.txt
index d1ed5d2..e6bd387 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,5 @@ cf_xarray
 datashader
 matplotlib
 Pillow
-rioxarray>=0.12.2
-scikit-learn
 xarray
 xpublish>=0.3.0,<0.4.0
diff --git a/xpublish_wms/utils.py b/xpublish_wms/utils.py
index 69d16b8..6e981b8 100644
--- a/xpublish_wms/utils.py
+++ b/xpublish_wms/utils.py
@@ -49,23 +49,6 @@ def speed_and_dir_for_uv(u, v):
     return [speed, dir]
 
 
-def ensure_crs(
-    ds: Union[xr.Dataset, xr.DataArray],
-    default_crs: str = "EPSG:4326",
-) -> Union[xr.Dataset, xr.DataArray]:
-    """
-    Ensure our dataset has a CRS
-    :param ds:
-    :param default_crs:
-    :return:
-    """
-    # logger.debug(f"CRS found in dataset : {ds.rio.crs}")
-    if not ds.rio.crs:
-        logger.debug(f"Settings default CRS : {default_crs}")
-        ds.rio.write_crs(default_crs, inplace=True)
-    return ds
-
-
 def lnglat_to_cartesian(longitude, latitude):
     """
     Converts latitude and longitude to cartesian coordinates