diff --git a/docs/requirements.txt b/docs/requirements.txt
index 9ace9643a351d88777e13215c5a46dd62d80d742..ff5031b3f8732eef2d2a9a1547b65c28a6201afd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 docutils==0.20.1
 myst-parser==2.0.0
+sphinx_rtd_theme==1.3.0