diff --git a/CHANGELOG.md b/CHANGELOG.md
index b502d2b..c46a3d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change Log
 All notable changes to this project will be documented in this file.
-This project adheres to [Semantic Versioning](http://semver.org/).
+This project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 ### Changed
diff --git a/docs/Makefile b/docs/Makefile
index d4bb2cb..2b19293 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -18,3 +18,11 @@ help:
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+
+# Check external links
+LINKCHECKDIR = $(BUILDDIR)/linkcheck
+
+.PHONY: checklinks
+checklinks:
+	$(SPHINXBUILD) -b linkcheck $(SPHINXOPTS) "$(SOURCEDIR)" "$(LINKCHECKDIR)"
diff --git a/docs/installation.rst b/docs/installation.rst
index 240597e..c5d030b 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -49,5 +49,5 @@ Or::
     BOOTLOADER_CC=/usr/local/musl/bin/musl-gcc pip3 install .
 
 
-.. _PyPI: https://pypi.python.org/pypi/staticx
+.. _PyPI: https://pypi.org/project/staticx/
 .. _musl libc: https://www.musl-libc.org/