diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c34ad2ef..c853340ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -578,7 +578,7 @@
   * Added autoloading support for root packages that use target-dir
   * Added awareness of the root package presence and support for it's provide/replace/conflict keys
   * Added IOInterface::isDecorated to test for colored output support
-  * Added validation of licenses based on the [SPDX registry](http://www.spdx.org/licenses/)
+  * Added validation of licenses based on the [SPDX registry](https://spdx.org/licenses/)
   * Improved repository protocol to have large cacheable parts
   * Fixed various bugs relating to package aliasing, proxy configuration, binaries
   * Various bug fixes and docs improvements
diff --git a/doc/00-intro.md b/doc/00-intro.md
index efc5c4c00..e0a81b05b 100644
--- a/doc/00-intro.md
+++ b/doc/00-intro.md
@@ -14,7 +14,7 @@ manager. It does however support a "global" project for convenience via the
 [global](03-cli.md#global) command.
 
 This idea is not new and Composer is strongly inspired by node's
-[npm](https://npmjs.org/) and ruby's [bundler](https://bundler.io/).
+[npm](https://www.npmjs.com/) and ruby's [bundler](https://bundler.io/).
 
 Suppose:
 
diff --git a/doc/04-schema.md b/doc/04-schema.md
index 8e9b55e49..0dc1c0f30 100644
--- a/doc/04-schema.md
+++ b/doc/04-schema.md
@@ -152,7 +152,7 @@ The recommended notation for the most common licenses is (alphabetical):
 - MIT
 
 Optional, but it is highly recommended to supply this. More identifiers are
-listed at the [SPDX Open Source License Registry](https://www.spdx.org/licenses/).
+listed at the [SPDX Open Source License Registry](https://spdx.org/licenses/).
 
 For closed-source software, you may use `"proprietary"` as the license identifier.
 
diff --git a/doc/07-community.md b/doc/07-community.md
index b79515d8c..4296f90cd 100644
--- a/doc/07-community.md
+++ b/doc/07-community.md
@@ -7,7 +7,7 @@ contributing.
 
 If you would like to contribute to Composer, please read the
 [README](https://github.com/composer/composer) and
-[CONTRIBUTING](https://github.com//composer/composer/blob/master/.github/CONTRIBUTING.md)
+[CONTRIBUTING](https://github.com/composer/composer/blob/master/.github/CONTRIBUTING.md)
 documents.
 
 The most important guidelines are described as follows:
diff --git a/doc/articles/troubleshooting.md b/doc/articles/troubleshooting.md
index 7bce67d29..9142f33c6 100644
--- a/doc/articles/troubleshooting.md
+++ b/doc/articles/troubleshooting.md
@@ -146,7 +146,7 @@ Or, you can increase the limit with a command-line argument:
 php -d memory_limit=-1 composer.phar <...>
 ```
 
-This issue can also happen on cPanel instances, when the shell fork bomb protection is activated. For more information, see the [documentation](https://documentation.cpanel.net/display/ALD/Shell+Fork+Bomb+Protection) of the fork bomb feature on the cPanel site.
+This issue can also happen on cPanel instances, when the shell fork bomb protection is activated. For more information, see the [documentation](https://documentation.cpanel.net/display/68Docs/Shell+Fork+Bomb+Protection) of the fork bomb feature on the cPanel site.
 
 ## Xdebug impact on Composer