diff --git a/environment.yml b/environment.yml
index fde49ab62..a9104e0b6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -3,7 +3,7 @@ channels:
   - conda-forge
 dependencies:
   - matplotlib>=3.5
-  - numpy>=1.17
+  - numpy<2.0
   - scipy>=1.6
   - netcdf4<=1.6.1
   - ffmpeg
@@ -29,7 +29,7 @@ dependencies:
   - cmocean
   - utm
   - roaring-landmask>=0.7
-  - trajan>=0.1.3
+  - trajan>=0.6.3
   - adios_db<1.2
   - copernicusmarine
   - pip
diff --git a/examples/example_openoil.py b/examples/example_openoil.py
index 6bda4bede..1f2ae1723 100755
--- a/examples/example_openoil.py
+++ b/examples/example_openoil.py
@@ -8,7 +8,7 @@
 from opendrift.readers import reader_netCDF_CF_generic
 from opendrift.models.openoil import OpenOil
 
-o = OpenOil(loglevel=20, weathering_model='noaa')
+o = OpenOil(loglevel=20, location='Norway')
 
 print(o.oiltypes)  # Print available oil types
 
diff --git a/opendrift/models/basemodel/__init__.py b/opendrift/models/basemodel/__init__.py
index 647cea911..dd5ea0804 100644
--- a/opendrift/models/basemodel/__init__.py
+++ b/opendrift/models/basemodel/__init__.py
@@ -3114,7 +3114,7 @@ def plot_timestep(i):
         if cmap is None:
             cmap = 'jet'
         if isinstance(cmap, str):
-            cmap = matplotlib.cm.get_cmap(cmap)
+            cmap = matplotlib.colormaps[cmap]
         if color is not False:
             if isinstance(color, str):
                 colorarray = self.get_property(color)[0].T
@@ -3499,7 +3499,7 @@ def plot(self,
                         lvmax = param.max()
                     lc = LineCollection(
                         segments,
-                        #cmap=plt.get_cmap('Spectral'),
+                        #cmap=plt.colormaps['Spectral'],
                         cmap=cmap,
                         norm=plt.Normalize(lvmin, lvmax),
                         transform=gcrs)
diff --git a/tests/models/test_models.py b/tests/models/test_models.py
index 9d99c2d7b..44ad6ca2f 100644
--- a/tests/models/test_models.py
+++ b/tests/models/test_models.py
@@ -168,7 +168,7 @@ def test_openberg(self):
         arr=[0.16072658,0.16466097,0.17384121,0.17325179,0.1715925,0.15592695]
 
         for indx in range(len(arr)):
-            self.assertAlmostEqual(o.uw_weighting[indx],arr[indx],8)
+            self.assertAlmostEqual(o.uw_weighting[indx],arr[indx],7)
 
         self.assertAlmostEqual(o.history['lon'].data[0][1],3.991, 3)
         self.assertAlmostEqual(o.history['lat'].data[0][1],62.011, 3)