diff --git a/docs/_config.yml b/docs/_config.yml
index 151b79e39..3814013ff 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -39,7 +39,7 @@ sphinx:
     - IPython.sphinxext.ipython_console_highlighting
 
     config:
-      html_theme: tskit_book_theme
+      html_theme: sphinx_book_theme
       html_theme_options:
         pygment_light_style: monokai
         pygment_dark_style: monokai
diff --git a/requirements/CI-docs/requirements.txt b/requirements/CI-docs/requirements.txt
index daa21b4e1..91b75ce59 100644
--- a/requirements/CI-docs/requirements.txt
+++ b/requirements/CI-docs/requirements.txt
@@ -1,7 +1,7 @@
 jupyter-book==0.15.1
 sphinx-issues==3.0.1
 sphinx-argparse==0.4.0
-tskit-book-theme # not pinned to enable easy updates
+sphinx-book-theme # not pinned to enable easy updates
 numpy==1.25.2
 tskit==0.5.5
 demes==0.2.3
diff --git a/requirements/development.txt b/requirements/development.txt
index 47cb66330..941a789b7 100644
--- a/requirements/development.txt
+++ b/requirements/development.txt
@@ -17,7 +17,7 @@ pytest
 pytest-cov
 pytest-xdist
 tskit>=0.5.2
-tskit-book-theme
+sphinx-book-theme
 stdpopsim>=0.1.2 # Make sure we have correct version of OOA model
 scipy
 setuptools_scm