From 5e9f4dc982458cd1a4eca6b72a3120b4a1d5066d Mon Sep 17 00:00:00 2001
From: 谭九鼎 <109224573@qq.com>
Date: Sat, 10 Oct 2020 00:24:09 +0800
Subject: Use https for links (#19244)

---
 README.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'README.md')

diff --git a/README.md b/README.md
index b100f8ac8c..d4bf01005c 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ builds of the same package.  With Spack, you can build your software
 *all* the ways you want to.
 
 See the
-[Feature Overview](http://spack.readthedocs.io/en/latest/features.html)
+[Feature Overview](https://spack.readthedocs.io/en/latest/features.html)
 for examples and highlights.
 
 To install spack and your first package, make sure you have Python.
@@ -34,14 +34,14 @@ Then:
 Documentation
 ----------------
 
-[**Full documentation**](http://spack.readthedocs.io/) is available, or
+[**Full documentation**](https://spack.readthedocs.io/) is available, or
 run `spack help` or `spack help --all`.
 
 Tutorial
 ----------------
 
 We maintain a
-[**hands-on tutorial**](http://spack.readthedocs.io/en/latest/tutorial.html).
+[**hands-on tutorial**](https://spack.readthedocs.io/en/latest/tutorial.html).
 It covers basic to advanced usage, packaging, developer features, and large HPC
 deployments.  You can do all of the exercises on your own laptop using a
 Docker container.
@@ -75,7 +75,7 @@ Your PR must pass Spack's unit tests and documentation tests, and must be
 [PEP 8](https://www.python.org/dev/peps/pep-0008/) compliant.  We enforce
 these guidelines with our CI process. To run these tests locally, and for 
 helpful tips on git, see our
-[Contribution Guide](http://spack.readthedocs.io/en/latest/contribution_guide.html).
+[Contribution Guide](https://spack.readthedocs.io/en/latest/contribution_guide.html).
 
 Spack's `develop` branch has the latest contributions. Pull requests
 should target `develop`, and users who want the latest package versions,
@@ -120,7 +120,7 @@ If you are referencing Spack in a publication, please cite the following paper:
 
  * Todd Gamblin, Matthew P. LeGendre, Michael R. Collette, Gregory L. Lee,
    Adam Moody, Bronis R. de Supinski, and W. Scott Futral.
-   [**The Spack Package Manager: Bringing Order to HPC Software Chaos**](http://www.computer.org/csdl/proceedings/sc/2015/3723/00/2807623.pdf).
+   [**The Spack Package Manager: Bringing Order to HPC Software Chaos**](https://www.computer.org/csdl/proceedings/sc/2015/3723/00/2807623.pdf).
    In *Supercomputing 2015 (SC’15)*, Austin, Texas, November 15-20 2015. LLNL-CONF-669890.
 
 License
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