diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 8fbc410482..044ba2d8fe 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -26,8 +26,8 @@ jobs:
     strategy:
       matrix:
         os: [
-          ubuntu-20.04,
-          windows-2019,
+          ubuntu-latest,
+          windows-latest,
           macos-14,
           macos-13,
         ]
diff --git a/continuous_integration/environment-ci.yml b/continuous_integration/environment-ci.yml
index a0e9c5b81e..cc74e5e51e 100644
--- a/continuous_integration/environment-ci.yml
+++ b/continuous_integration/environment-ci.yml
@@ -24,7 +24,7 @@ dependencies:
   - cftime
   - setuptools
   - shapely
-  - ruff==0.4.2
+  - ruff
   - mda-xdrlib
   - xradar
   - pooch
diff --git a/examples/plotting/radar-cross-section.ipynb b/examples/plotting/radar-cross-section.ipynb
index 4fe48a2ca0..36c8cacd27 100644
--- a/examples/plotting/radar-cross-section.ipynb
+++ b/examples/plotting/radar-cross-section.ipynb
@@ -7,6 +7,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "import cartopy.crs as ccrs\n",
     "import matplotlib.pyplot as plt\n",
     "\n",
     "import pyart\n",
diff --git a/pyart/graph/radarmapdisplay_basemap.py b/pyart/graph/radarmapdisplay_basemap.py
index d0972771f3..50582b6701 100644
--- a/pyart/graph/radarmapdisplay_basemap.py
+++ b/pyart/graph/radarmapdisplay_basemap.py
@@ -288,7 +288,7 @@ def plot_ppi_map(
             data = np.ma.masked_outside(data, vmin, vmax)
 
         # create the basemap if not provided
-        if type(basemap) != Basemap:
+        if not isinstance(basemap, Basemap):
             using_corners = None not in [min_lon, min_lat, max_lon, max_lat]
             if using_corners:
                 basemap = Basemap(
diff --git a/requirements.txt b/requirements.txt
index 736c3569c0..cec082875d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,15 +1,15 @@
 numpy
 scipy
-netCDF4>=1.7.0
+netCDF4
 matplotlib
 pooch
 cftime
 fsspec
 s3fs
 open_radar_data
-xradar>=0.5.0
+xradar
 pandas
 mda-xdrlib
-xarray!=0.21.0
+xarray
 cartopy
 pint
diff --git a/tests/io/test_cfradial.py b/tests/io/test_cfradial.py
index 443100bf5b..6b6115dc50 100644
--- a/tests/io/test_cfradial.py
+++ b/tests/io/test_cfradial.py
@@ -486,7 +486,7 @@ def attribute_equal(class1, class2, key, allow_str_case_diff=True):
     a1 = getattr(class1, key)
     a2 = getattr(class2, key)
 
-    assert type(a1) == type(a2)
+    assert type(a1) == type(a2)  # noqa
 
     if isinstance(a1, str) and allow_str_case_diff:
         assert a1.upper() == a2.upper()