diff --git a/docs/requirements.txt b/docs/requirements.txt
index bd943b3..e41a0bd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -4,3 +4,4 @@ scipy
 pandas>=2
 Sphinx>=4.2.0
 sphinx-rtd-theme>=1.0.0
+threadpoolctl