diff --git a/docs/rtfd-requirements.txt b/docs/rtfd-requirements.txt
index d02c7aa..e7a5e89 100644
--- a/docs/rtfd-requirements.txt
+++ b/docs/rtfd-requirements.txt
@@ -1,7 +1,7 @@
 attrs==19.1.0
 cffi==1.12.2
 Sphinx==1.8.4
-sphinx-rtd-theme==0.4.3
+sphinx-rtd-theme==0.5.2
 sphinxcontrib-websupport==1.1.0
 trio==0.11.0
 git+https://github.com/Ninpo/trio-inotify.git