diff --git a/.github/workflows/ci_tests_dev.yaml b/.github/workflows/ci_tests_dev.yaml
index 4c2e9864f93..7cc17a559d7 100644
--- a/.github/workflows/ci_tests_dev.yaml
+++ b/.github/workflows/ci_tests_dev.yaml
@@ -143,7 +143,7 @@ jobs:
         run: |
           python -m pip install --pre --prefer-binary \
                         --extra-index https://pypi.anaconda.org/scientific-python-nightly-wheels/simple \
-                        'numpy<2' pandas xarray netCDF4 packaging \
+                        numpy pandas xarray netCDF4 packaging \
                         build contextily dvc geopandas ipython pyarrow rioxarray \
                         pytest pytest-cov pytest-doctestplus pytest-mpl pytest-rerunfailures pytest-xdist\
                         sphinx-gallery
diff --git a/pygmt/clib/conversion.py b/pygmt/clib/conversion.py
index eb8daa61da1..95f2f08aa51 100644
--- a/pygmt/clib/conversion.py
+++ b/pygmt/clib/conversion.py
@@ -124,6 +124,8 @@ def dataarray_to_matrix(grid):
         grid = grid.sortby(variables=list(grid.dims), ascending=True)
 
     matrix = as_c_contiguous(grid[::-1].to_numpy())
+    region = [float(i) for i in region]
+    inc = [float(i) for i in inc]
     return matrix, region, inc