diff --git a/docs/conf.py b/docs/conf.py
index e6a1f93..b809fcc 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,6 +26,7 @@
 # autodoc_inherit_docstrings = True
 napoleon_include_init_with_doc = True
 napoleon_numpy_docstring = True
+viewcode_line_numbers = True
 myst_heading_anchors = 5
 suppress_warnings = ["myst.header"]