diff --git a/sphinx_lesson/__init__.py b/sphinx_lesson/__init__.py
index 888d076..1411d57 100644
--- a/sphinx_lesson/__init__.py
+++ b/sphinx_lesson/__init__.py
@@ -6,13 +6,21 @@ def setup(app):
     app.setup_extension('myst_nb')
     app.setup_extension('sphinx_copybutton')
     app.setup_extension('sphinx_minipres')
-    app.setup_extension('sphinx_tabs.tabs')
     app.setup_extension('sphinx_togglebutton')
     app.setup_extension(__name__+'.directives')
     app.setup_extension(__name__+'.md_transforms')
     app.setup_extension(__name__+'.exerciselist')
     app.setup_extension(__name__+'.term_role_formatting')
 
+    if 'pdf' not in app.tags:
+        # sphinx_tabs does not support the PDF builder. Use it for other builds.
+        app.setup_extension('sphinx_tabs.tabs')
+    else:
+        # Use imgmath to render math without javascript in PDF builds
+        app.setup_extension("sphinx.ext.imgmath")
+        # Render tab groups as a list instead of tabs in PDF builds
+        app.setup_extension("sphinx_pyppeteer_builder.tabs")
+
     return {
         'version': __version__,
         'parallel_read_safe': True,