diff --git a/README.md b/README.md
index bc8003b..67d2fc2 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ the type `fast_float::chars_format`. It is a bitset value: we check whether
 to determine whether we allow the fixed point and scientific notation respectively.
 The default is  `fast_float::chars_format::general` which allows both `fixed` and `scientific`.
 
-We support Visual Studio, macOS, Linux, freeBSD.
+We support Visual Studio, macOS, Linux, freeBSD. We support big and little endian. We support 32-bit and 64-bit systems.
 
 ## Relation With Other Work