diff --git a/setup.cfg b/setup.cfg
index 640da0d..b83d4d1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -94,7 +94,7 @@ console_scripts =
 dev =
     docutils            <= 0.16    # In 0.17 bullet lists aren't rendered at all with sphinx-rtd-theme
     sphinx              == 4.2.0   # Documentation generation
-    sphinx-rtd-theme    == 0.5.0   # Documentation theme
+    sphinx-rtd-theme    == 3.0.1   # Documentation theme
     sphinx-argparse     == 0.2.5   # I don't think we even use this
     mypy-zope           == 1.0.5   # Type stubs for zope.interface
     types-pkg_resources == 0.1.3   # Type stubs for package introspection API