diff --git a/README.md b/README.md
index aef5edf..e8303e9 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Half Life 1 SDK Copyright© Valve Corp.
 
 THIS DOCUMENT DESCRIBES A CONTRACT BETWEEN YOU AND VALVE CORPORATION (“Valve”).  PLEASE READ IT BEFORE DOWNLOADING OR USING THE HALF LIFE 1 SDK (“SDK”). BY DOWNLOADING AND/OR USING THE SOURCE ENGINE SDK YOU ACCEPT THIS LICENSE. IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENSE PLEASE DON’T DOWNLOAD OR USE THE SDK.
 
-You may, free of charge, download and use the SDK to develop a modified Valve game running on the Half-Life engine.  You may distribute your modified Valve game in source and object code form, but only for free. Terms of use for Valve games are found in the Steam Subscriber Agreement located here: http://store.steampowered.com/subscriber_agreement/ 
+You may, free of charge, download and use the SDK to develop a modified Valve game running on the Half-Life engine.  You may distribute your modified Valve game in source and object code form, but only for free. Terms of use for Valve games are found in the Steam Subscriber Agreement located here: https://store.steampowered.com/subscriber_agreement/ 
 
 You may copy, modify, and distribute the SDK and any modifications you make to the SDK in source and object code form, but only for free.  Any distribution of this SDK must include this license.txt and third_party_licenses.txt.