diff --git a/.readthedocs.yml b/.readthedocs.yml
new file mode 100644
index 000000000..fdb43f442
--- /dev/null
+++ b/.readthedocs.yml
@@ -0,0 +1,9 @@
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+version: 2
+
+sphinx:
+  configuration: docs/conf.py
+
+conda:
+  environment: docs/env.yml
diff --git a/docs/env.yml b/docs/env.yml
new file mode 100644
index 000000000..976d88d98
--- /dev/null
+++ b/docs/env.yml
@@ -0,0 +1,15 @@
+name: python-graphblas-docs
+channels:
+    - conda-forge
+dependencies:
+    - python=3.8
+    - graphblas
+    - matplotlib
+    - networkx
+    - pandas
+    - scipy
+    - pip
+    - pip:
+        - nbsphinx
+        - sphinx_panels
+        - pydata_sphinx_theme
diff --git a/docs/user_guide/operators.rst b/docs/user_guide/operators.rst
index 1dc14a93c..96e7ff96b 100644
--- a/docs/user_guide/operators.rst
+++ b/docs/user_guide/operators.rst
@@ -184,7 +184,7 @@ Example usage with a thunk parameter:
 
 Defined IndexUnary operators are:
 
-    **index** -- return the vector index
+  - **index** -- return the vector index
   - **rowindex** -- return the matrix row index
   - **colindex** -- return the matrix column index
   - **diagindex** -- return the matrix diagonal index (i.e. column - row)