diff --git a/setup.py b/setup.py
index caa6b10..c0b35bd 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
         'docs': [
             'sphinx>=2.2,<3.6',
             'sphinx-autobuild>=0.7,<2020.10',
-            'sphinx_rtd_theme>=0.4,<0.6',
+            'sphinx_rtd_theme>=0.4,<1.2',
         ]
     },
     include_package_data=True,