diff --git a/setup.cfg b/setup.cfg
index 6fcb123d..3b01e957 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -63,8 +63,8 @@ install_requires =
     world-bank-data
     scikit-learn
     otoole>=1.0.0
-    #sphinx-book-theme
-    sphinx-book-theme==0.1.6
+    sphinx-book-theme
+    #sphinx-book-theme==0.1.6
     myst-parser
     otoole>=1.0.0,<1.1.0
     scipy