Issue #26736: Used HTTPS for external links in the documentation if possible.
diff --git a/Doc/library/tkinter.rst b/Doc/library/tkinter.rst
index f0d5d57..ab1da52 100644
--- a/Doc/library/tkinter.rst
+++ b/Doc/library/tkinter.rst
@@ -26,13 +26,13 @@
`TKDocs <http://www.tkdocs.com/>`_
Extensive tutorial plus friendlier widget pages for some of the widgets.
- `Tkinter reference: a GUI for Python <http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/index.html>`_
+ `Tkinter reference: a GUI for Python <https://infohost.nmt.edu/tcc/help/pubs/tkinter/web/index.html>`_
On-line reference material.
`Tkinter docs from effbot <http://effbot.org/tkinterbook/>`_
Online reference for tkinter supported by effbot.org.
- `Tcl/Tk manual <http://www.tcl.tk/man/tcl8.5/>`_
+ `Tcl/Tk manual <https://www.tcl.tk/man/tcl8.5/>`_
Official manual for the latest tcl/tk version.
`Programming Python <http://learning-python.com/books/about-pp4e.html>`_