diff --git a/.travis.yml b/.travis.yml
index 8dc4347..a4b40da 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,7 +37,7 @@ before_install:
   - export PATH="$CONDA_PREFIX/bin:$PATH"
   - hash -r
   - conda config --set always_yes yes --set changeps1 no
-  - conda create -n test_env python=$CONDA_ENV
+  - conda create -n test_env python=$CONDA_ENV --file=requirements.txt -c conda-forge
   - source activate test_env
   - conda info -a && conda list
 install:
diff --git a/notebooks/test_bmi_dev.ipynb b/notebooks/test_bmi_dev.ipynb
index a4f9ba7..3993a29 100644
--- a/notebooks/test_bmi_dev.ipynb
+++ b/notebooks/test_bmi_dev.ipynb
@@ -219,7 +219,7 @@
     {
      "data": {
       "text/plain": [
-       "<matplotlib.collections.QuadMesh at 0x7f5a07a83dc0>"
+       "<matplotlib.collections.QuadMesh at 0x7fa6cd644f10>"
       ]
      },
      "execution_count": 8,
@@ -302,7 +302,7 @@
     {
      "data": {
       "text/plain": [
-       "<matplotlib.contour.QuadContourSet at 0x7f5a06081490>"
+       "<matplotlib.contour.QuadContourSet at 0x7fa6cd503460>"
       ]
      },
      "execution_count": 13,
@@ -370,16 +370,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 17,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.contour.QuadContourSet at 0x7f5a05d03fa0>"
+       "<matplotlib.contour.QuadContourSet at 0x7fa6cd349cd0>"
       ]
      },
-     "execution_count": 17,
+     "execution_count": 16,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -402,7 +402,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 22,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -430,7 +430,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 32,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
@@ -456,7 +456,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 34,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -478,7 +478,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 38,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -490,7 +490,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 42,
+   "execution_count": 21,
    "metadata": {},
    "outputs": [
     {
@@ -512,7 +512,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": 22,
    "metadata": {},
    "outputs": [
     {
@@ -521,7 +521,7 @@
        "<AxesSubplot:>"
       ]
      },
-     "execution_count": 43,
+     "execution_count": 22,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -544,7 +544,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 47,
+   "execution_count": 23,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -554,7 +554,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 59,
+   "execution_count": 24,
    "metadata": {},
    "outputs": [
     {
@@ -580,12 +580,12 @@
       "2         3.0    10U         NaN         NaN        NaN  \n",
       "3         4.0    10U         NaN         NaN        NaN  \n",
       "4         5.0    10U         NaN         NaN        NaN  \n",
-      "Gridmet variable tmax retrieved: GIS/gm_tmax2020_09_01.nc\n",
-      "Gridmet variable tmin retrieved: GIS/gm_tmin2020_09_01.nc\n",
-      "Gridmet variable ppt retrieved: GIS/gm_ppt2020_09_01.nc\n",
-      "Gridmet variable rhmax retrieved: GIS/gm_rhmax2020_09_01.nc\n",
-      "Gridmet variable rhmin retrieved: GIS/gm_rhmin2020_09_01.nc\n",
-      "Gridmet variable ws retrieved: GIS/gm_ws2020_09_01.nc\n",
+      "Gridmet variable tmax retrieved: GIS/gm_tmax2020_11_04.nc\n",
+      "Gridmet variable tmin retrieved: GIS/gm_tmin2020_11_04.nc\n",
+      "Gridmet variable ppt retrieved: GIS/gm_ppt2020_11_04.nc\n",
+      "Gridmet variable rhmax retrieved: GIS/gm_rhmax2020_11_04.nc\n",
+      "Gridmet variable rhmin retrieved: GIS/gm_rhmin2020_11_04.nc\n",
+      "Gridmet variable ws retrieved: GIS/gm_ws2020_11_04.nc\n",
       "Gridmet returned days = 2 and expected number of days 2\n"
      ]
     },
@@ -595,7 +595,7 @@
        "True"
       ]
      },
-     "execution_count": 59,
+     "execution_count": 24,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -612,7 +612,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 60,
+   "execution_count": 25,
    "metadata": {},
    "outputs": [
     {
@@ -631,7 +631,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 61,
+   "execution_count": 26,
    "metadata": {},
    "outputs": [
     {
@@ -666,7 +666,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 64,
+   "execution_count": 27,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -675,7 +675,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 65,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -684,7 +684,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 67,
+   "execution_count": 29,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -693,7 +693,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 72,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [
     {
@@ -702,7 +702,7 @@
        "<AxesSubplot:>"
       ]
      },
-     "execution_count": 72,
+     "execution_count": 30,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -725,7 +725,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 73,
+   "execution_count": 31,
    "metadata": {},
    "outputs": [
     {
@@ -734,7 +734,7 @@
        "<AxesSubplot:>"
       ]
      },
-     "execution_count": 73,
+     "execution_count": 31,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -757,7 +757,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 75,
+   "execution_count": 32,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -766,7 +766,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 76,
+   "execution_count": 33,
    "metadata": {},
    "outputs": [
     {
@@ -775,7 +775,7 @@
        "<AxesSubplot:>"
       ]
      },
-     "execution_count": 76,
+     "execution_count": 33,
      "metadata": {},
      "output_type": "execute_result"
     },
diff --git a/requirements.txt b/requirements.txt
index 1d5a62f..3911f1b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,8 @@
+bmipy
+click
+netcdf4
 numpy
+pyyaml
 requests
 xarray
 pandas