diff --git a/setup.py b/setup.py
index 1f65ca97..3328785e 100644
--- a/setup.py
+++ b/setup.py
@@ -116,7 +116,9 @@ extras = {
         #
         # package                       # low                   high
 
-        'Sphinx',                       # 1.2
+        # TODO: remove version workaround after next sphinx[-rtd-theme] release
+        # cf. https://github.com/readthedocs/sphinx_rtd_theme/issues/1343
+        'Sphinx!=5.2.0.post0',          # 1.2
         'sphinx-rtd-theme',             # 0.2.4
     ],