diff --git a/README.md b/README.md
index 4426e8304e..92a98fc57a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
 IfcOpenShell 
 ============
 IfcOpenShell is an open source ([LGPL]) software library for working with the Industry Foundation Classes ([IFC]) 
-file format. Currently supported IFC releases are [IFC2x3 TC1] and [IFC4 Add2 TC1].
+file format. Extensive geometric support is implemented for the IFC releases [IFC2x3 TC1] and [IFC4 Add2 TC1].
+Support for parsing is provided for IFC4x1, IFC4x2, and the IFC4x3 release candidates. Extending with support for
+arbitrary IFC schemas is possible at compile-time when using C++ and at run-time when using Python.
 
 For more information, see
 * [http://ifcopenshell.org](http://ifcopenshell.org)