diff --git a/requirements_dev.txt b/requirements_dev.txt
index b03e82f6..9a87c5eb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -4,7 +4,7 @@ flake8==7.1.1
 tox==4.23.2
 coverage==7.6.4
 Sphinx>=5.0.0
-sphinx_rtd_theme
+sphinx_rtd_theme==3.0.1
 twine==4.0.1
 pytest
 pytest-runner