diff --git a/ci/unittests.yml b/ci/unittests.yml
index fd2221c..2391459 100644
--- a/ci/unittests.yml
+++ b/ci/unittests.yml
@@ -6,6 +6,7 @@ dependencies:
   - dask
   - h5netcdf
   - h5py
+  - lat_lon_parser
   - netCDF4
   - numpy
   - pip
diff --git a/environment.yml b/environment.yml
index 67bd3a3..40423e6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -13,6 +13,7 @@ dependencies:
   - ipykernel
   - h5netcdf
   - h5py
+  - lat_lon_parser
   - netCDF4
   - xarray
   - xarray-datatree
diff --git a/requirements.txt b/requirements.txt
index 3516f20..8d20ef0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 dask
 h5netcdf
 h5py
+lat_lon_parser
 netCDF4
 numpy
 xarray