diff --git a/docs/requirements.txt b/docs/requirements.txt
index 4dd0e15..f6f0848 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
 # RTD pins by default to ancient versions
-sphinx-rtd-theme ~= 1.2
+sphinx-rtd-theme ~= 1.3
 m2r2 ~= 0.3