diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5d31e33..5914799 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
 sphinx==4.5.0
-sphinx-rtd-theme==0.5.2
+sphinx-rtd-theme==3.1.0
 -e .