diff --git a/doc/conf.py b/doc/conf.py
index cbcab492adc54fb8bd0ff15214e508d663627168..a07433fa663e75c2ec944840a9f662ee0a6808cf 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -18,6 +18,7 @@ extensions = [
     "sphinx.ext.napoleon",
     "sphinx.ext.viewcode",
     "sphinx.ext.intersphinx",
+    "auto_intersphinx",
 ]
 
 # Be picky about warnings