diff --git a/doc/en/conf.py b/doc/en/conf.py
index 5941716ab..3e881ea01 100644
--- a/doc/en/conf.py
+++ b/doc/en/conf.py
@@ -329,7 +329,7 @@ texinfo_documents = [
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"python": ("http://docs.python.org/3", None)}
+intersphinx_mapping = {"python": ("https://docs.python.org/3", None)}
 
 
 def setup(app):