diff --git a/doc/sphinxext/related_software.py b/doc/sphinxext/related_software.py
index d1df773b380..18df35424d7 100644
--- a/doc/sphinxext/related_software.py
+++ b/doc/sphinxext/related_software.py
@@ -35,6 +35,7 @@
     "niseq",
     "sesameeg",
     "mne-kit-gui",  # moved to its own env in the installers
+    "zuna",
 }
 
 # If it's not available on PyPI, add it to this dict: