diff --git a/README.md b/README.md
index 9260aefd..fb980f4e 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ These platforms are officially tested.
 + Raspberry Pi OS 64-bit
 + [Luckfox Pico SDK](https://github.com/LuckfoxTECH/luckfox-pico) 32-bit
 
+On Windows platform, only MSVC compiler is officially supported.
+
 ## Quick Start
 
 You have two options to integrate pkpy into your project.
diff --git a/docs/index.md b/docs/index.md
index b01f0129..5a080392 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -46,6 +46,8 @@ These platforms are officially tested.
 + Raspberry Pi OS 64-bit
 + [Luckfox Pico SDK](https://github.com/LuckfoxTECH/luckfox-pico) 32-bit
 
+On Windows platform, only MSVC compiler is officially supported.
+
 ## Star the repo
 
 If you find pkpy useful, consider [star this repository](https://github.com/blueloveth/pocketpy) (●'◡'●)