diff --git a/License.md b/License.md
index bcb5f2a..a26243e 100644
--- a/License.md
+++ b/License.md
@@ -5,7 +5,7 @@ All rights reserved.
 
 Based on Markdown  
 Copyright (c) 2003-2006 John Gruber   
-<http://daringfireball.net/>   
+<https://daringfireball.net/>   
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/Michelf/Markdown.php b/Michelf/Markdown.php
index 5585d3c..f403735 100644
--- a/Michelf/Markdown.php
+++ b/Michelf/Markdown.php
@@ -8,7 +8,7 @@
 #
 # Original Markdown  
 # Copyright (c) 2004-2006 John Gruber  
-# <http://daringfireball.net/projects/markdown/>
+# <https://daringfireball.net/projects/markdown/>
 #
 namespace Michelf;
 
@@ -493,7 +493,7 @@ class Markdown implements MarkdownInterface {
 		"doImages"            =>  10,
 		"doAnchors"           =>  20,
 		
-		# Make links out of things like `<http://example.com/>`
+		# Make links out of things like `<https://example.com/>`
 		# Must come after doAnchors, because you can use < and >
 		# delimiters in inline links like [this](<url>).
 		"doAutoLinks"         =>  30,
diff --git a/Michelf/MarkdownExtra.php b/Michelf/MarkdownExtra.php
index 3107a79..2dd8569 100644
--- a/Michelf/MarkdownExtra.php
+++ b/Michelf/MarkdownExtra.php
@@ -8,7 +8,7 @@
 #
 # Original Markdown
 # Copyright (c) 2004-2006 John Gruber  
-# <http://daringfireball.net/projects/markdown/>
+# <https://daringfireball.net/projects/markdown/>
 #
 namespace Michelf;
 
diff --git a/Michelf/MarkdownInterface.php b/Michelf/MarkdownInterface.php
index 0fc163a..4e0738e 100644
--- a/Michelf/MarkdownInterface.php
+++ b/Michelf/MarkdownInterface.php
@@ -8,7 +8,7 @@
 #
 # Original Markdown
 # Copyright (c) 2004-2006 John Gruber
-# <http://daringfireball.net/projects/markdown/>
+# <https://daringfireball.net/projects/markdown/>
 #
 namespace Michelf;
 
diff --git a/Readme.md b/Readme.md
index fa7fe58..53dbb20 100644
--- a/Readme.md
+++ b/Readme.md
@@ -7,7 +7,7 @@ by Michel Fortin
 <https://michelf.ca/>
 
 based on Markdown by John Gruber  
-<http://daringfireball.net/>
+<https://daringfireball.net/>
 
 
 Introduction
@@ -25,7 +25,7 @@ software tool, originally written in Perl, that converts the plain text
 markup to HTML. PHP Markdown is a port to PHP of the original Markdown 
 program by John Gruber.
 
-*	[Full documentation of the Markdown syntax](<http://daringfireball.net/projects/markdown/>)  
+*	[Full documentation of the Markdown syntax](<https://daringfireball.net/projects/markdown/>)  
 	— Daring Fireball (John Gruber)
 *	[Markdown Extra syntax additions](<https://michelf.ca/projects/php-markdown/extra/>)  
 	— Michel Fortin
@@ -295,7 +295,7 @@ All rights reserved.
 
 Based on Markdown  
 Copyright (c) 2003-2005 John Gruber   
-<http://daringfireball.net/>   
+<https://daringfireball.net/>   
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/composer.json b/composer.json
index ec0e170..36a4f74 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
 		},
 		{
 			"name": "John Gruber",
-			"homepage": "http://daringfireball.net/"
+			"homepage": "https://daringfireball.net/"
 		}
 	],
 	"require": {