diff --git a/python/ngen_cal/setup.cfg b/python/ngen_cal/setup.cfg
index 8c27307f..a5ac0f38 100644
--- a/python/ngen_cal/setup.cfg
+++ b/python/ngen_cal/setup.cfg
@@ -52,3 +52,7 @@ where = src
 develop =
     pytest
     pytest-mock
+
+netcdf =
+    xarray
+    netcdf4