diff --git a/README.md b/README.md
index 1d3529f..cc6f908 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Windows x86: development platform for [PlatformIO](http://platformio.org)
+# Windows x86: development platform for [PlatformIO](https://platformio.org)
 [![Build status](https://ci.appveyor.com/api/projects/status/4tqtddjgafvwawmn/branch/develop?svg=true)](https://ci.appveyor.com/project/ivankravets/platform-windows-x86/branch/develop)
 
 Windows x86 (32-bit) is a metafamily of graphical operating systems developed and marketed by Microsoft. Using host OS (Windows, Linux 32/64 or Mac OS X) you can build native application for Windows x86 platform.
@@ -8,7 +8,7 @@ Windows x86 (32-bit) is a metafamily of graphical operating systems developed an
 
 # Usage
 
-1. [Install PlatformIO](http://platformio.org)
+1. [Install PlatformIO](https://platformio.org)
 2. Create PlatformIO project and configure a platform option in [platformio.ini](https://docs.platformio.org/page/projectconf.html) file:
 
 ## Stable version
diff --git a/platform.json b/platform.json
index 788fc31..b3b597f 100644
--- a/platform.json
+++ b/platform.json
@@ -10,7 +10,7 @@
     "x86"
   ],
   "engines": {
-    "platformio": "^5"
+    "platformio": "^6"
   },
   "repository": {
     "type": "git",