diff --git a/environment.yml b/environment.yml
index a28d7d6..8f68fe6 100644
--- a/environment.yml
+++ b/environment.yml
@@ -16,5 +16,6 @@ dependencies:
   - requests
   - aiohttp
   - sphinx-pythia-theme
+  - numpy<2
   - pip:
       - intake-markdown
diff --git a/notebooks/catalog.yml b/notebooks/catalog.yml
index 9e8be95..223f9b2 100644
--- a/notebooks/catalog.yml
+++ b/notebooks/catalog.yml
@@ -5,8 +5,7 @@ metadata:
 sources:
   data_dictionary:
     args:
-      csv_kwargs:
-        keep_default_na: false
+      keep_default_na: false
       urlpath: '{{ CATALOG_DIR }}/inventory.csv'
     description: Describes the data in the hrrrzarr source
     driver: intake.source.csv.CSVSource
diff --git a/notebooks/creating_catalogs.ipynb b/notebooks/creating_catalogs.ipynb
index c84f623..450ed3d 100644
--- a/notebooks/creating_catalogs.ipynb
+++ b/notebooks/creating_catalogs.ipynb
@@ -296,8 +296,7 @@
    },
    "outputs": [],
    "source": [
-    "source = intake.open_csv('inventory.csv',\n",
-    "                                  csv_kwargs={'keep_default_na': False})\n",
+    "source = intake.open_csv('inventory.csv')\n",
     "source.name = 'data_dictionary'\n",
     "source.description = 'Describes the data in the hrrrzarr source'"
    ]