diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 6b1284c..7db3cf8 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -12,3 +12,7 @@ build:
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
   configuration: docs/conf.py
+
+python:
+  install:
+    - requirements: docs/requirements.txt
diff --git a/docs/requirements.txt b/docs/requirements.txt
new file mode 100644
index 0000000..483a4e9
--- /dev/null
+++ b/docs/requirements.txt
@@ -0,0 +1 @@
+sphinx_rtd_theme