diff --git a/setup.cfg b/setup.cfg
index db84300..d575244 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -31,8 +31,8 @@ docs =
     sphinx-automodapi
     sphinx-astropy
     matplotlib
-    pydata-sphinx-theme==0.8.1
-    sphinx-book-theme==0.3.3
+    pydata-sphinx-theme
+    sphinx-book-theme
     numpydoc
 
 [options.package_data]