diff --git a/doc/Rectilinear_grid.ipynb b/doc/Rectilinear_grid.ipynb
index 67e1dc2..29a6c09 100644
--- a/doc/Rectilinear_grid.ipynb
+++ b/doc/Rectilinear_grid.ipynb
@@ -93,7 +93,7 @@
    },
    "outputs": [],
    "source": [
-    "dr = ds['air']  # extract an DataArray"
+    "dr = ds['air']  # get a DataArray"
    ]
   },
   {
diff --git a/doc/installation.rst b/doc/installation.rst
index 17bbda1..604bab0 100644
--- a/doc/installation.rst
+++ b/doc/installation.rst
@@ -6,7 +6,8 @@ Installation
 The quickest way
 ----------------
 
-xESMF depends on xarray and ESMPy. The best way to install them is using Anaconda_::
+xESMF requires Python>=3.5. The major dependencies are xarray and ESMPy.
+The best way to install them is using Anaconda_.::
 
     $ conda install xarray
     $ conda install -c nesii/label/dev-esmf -c conda-forge esmpy