diff --git a/requirements.txt b/requirements.txt
index bc435feb3..c78c4e221 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ pygments==2.15.1
 
 # Sphinx base and RTD theme.
 sphinx==4.4.0
-sphinx_rtd_theme==1.1.1
+sphinx_rtd_theme==2.0.0
 
 # Sphinx extensions.