diff --git a/doc/requirements.txt b/doc/requirements.txt
index 6d4758d..a42dee4 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -2,7 +2,7 @@ pyusb
 Pillow>=2.0
 qrcode>=4.0
 pyserial
-sphinx-rtd-theme==1.2.0
+sphinx-rtd-theme==1.2.1
 setuptools
 setuptools-scm
 docutils>=0.12