diff --git a/Code/README.md b/Code/README.md
index 3f483af..8d92313 100644
--- a/Code/README.md
+++ b/Code/README.md
@@ -72,7 +72,7 @@ use up/down key to select *.nes rom,
 
 press -(select) and =(start) together, will reset the emulator to the rom selection page.
 
-
+Due to the limitation of Pico memory, only ROMs with a size less than or equal to **44KB** can be used.