diff --git a/environment-dev.yml b/environment-dev.yml
index 9ada952..b8e5a20 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -2,6 +2,7 @@ name: hyswap-dev-environment
 channels:
   - conda-forge
 dependencies:
+  - python<3.13
   - numpy
   - pandas
   - scipy
@@ -14,7 +15,7 @@ dependencies:
   - matplotlib
   - folium
   - mapclassify
-  - pynhd
+  - pynhd>=0.18.0
   - tqdm
   - pydeps==1.12.3
   - pip
diff --git a/example_notebooks/regional_runoff_calculations.ipynb b/example_notebooks/regional_runoff_calculations.ipynb
index f7f447e..84f84cc 100644
--- a/example_notebooks/regional_runoff_calculations.ipynb
+++ b/example_notebooks/regional_runoff_calculations.ipynb
@@ -26,7 +26,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -80,7 +80,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -149,7 +149,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -222,7 +222,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -286,7 +286,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -322,7 +322,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -386,7 +386,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -411,7 +411,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -444,7 +444,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -511,7 +511,7 @@
    "formats": "ipynb,qmd"
   },
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "hyswap-dev-environment",
    "language": "python",
    "name": "python3"
   },
@@ -525,7 +525,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.5"
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,