diff --git a/doc/conf.py b/doc/conf.py
index 4d3e2d8b5c0..8359d3d4049 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -161,7 +161,8 @@ rst_epilog = f"""
 html_theme = "sphinx_rtd_theme"
 html_theme_options = {
     "logo_only": True,
-    "prev_next_buttons_location": None
+    "prev_next_buttons_location": None,
+    "navigation_depth": 5,
 }
 html_baseurl = "https://docs.zephyrproject.org/latest/"
 html_title = "Zephyr Project Documentation"