diff --git a/conf.py b/conf.py
index 1699424b..72b3335f 100644
--- a/conf.py
+++ b/conf.py
@@ -21,7 +21,7 @@
 
 project = 'Learn Multibody Dynamics'
 html_title = project
-copyright = '2022-2025, Jason K. Moore'
+copyright = '2022-2026, Jason K. Moore'
 author = 'Jason K. Moore'
 version = '0.5.dev0'
 
@@ -64,6 +64,10 @@
 # labeled, using :numref:`my_figure`.
 numfig = True
 
+# Make sure that autosectionlabel generates unique labels even if the same
+# section titles appear in different pages.
+autosectionlabel_prefix_document = True
+
 # Sphinx >=4 default to MathJax v3, but v3 does not support wrapping lines. So
 # force Sphinx to use v2 and config MathJax to wrap long lines.
 mathjax_path = "https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js?config=TeX-AMS-MML_HTMLorMML"