diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 1cfd6ef..eac5d8e 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -17,3 +17,9 @@ build:
 # Sphinx configuration file
 sphinx:
   configuration: docs/conf.py
+
+# We recommend specifying your dependencies to enable reproducible builds:
+# https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+# python:
+install:
+  - requirements: docs/requirements.txt
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..5165a4d
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1,6 @@
+# SPDX-FileCopyrightText: 2023 Alec Delaney
+#
+# SPDX-License-Identifier: MIT
+
+sphinx
+sphinx-rtd-theme