diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 000000000..9a17f94d9
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,10 @@
+version: 2
+
+sphinx:
+    configuration: docs/conf.py
+
+python:
+    version: 3.7
+    install:
+    - requirements: docs/requirements.txt
+    - requirements: requirements.txt
diff --git a/README.rst b/README.rst
index 29b9ffa56..3c8974f62 100644
--- a/README.rst
+++ b/README.rst
@@ -70,10 +70,12 @@ be considered unstable.
 
 Documentation
 -------------
-The SOCS documentation can be built using sphinx once you have performed the
-installation::
+The SOCS documentation can be built using Sphinx. There is a separate
+``requirements.txt`` file in the ``docs/`` directory to install Sphinx and any
+additional documentation dependencies::
 
   cd docs/
+  pip3 install -r requirements.txt
   make html
 
 You can then open ``docs/_build/html/index.html`` in your preferred web
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 000000000..6de08b019
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,3 @@
+sphinx==4.2.0
+sphinx_rtd_theme==1.0.0
+sphinx-argparse==0.3.1
diff --git a/requirements.txt b/requirements.txt
index 4edf49168..c2d2a513a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ pysnmp
 pysmi
 
 # Docs
-sphinx_rtd_theme
+# see docs/requirements.txt
 
 # testing
 pytest