diff --git a/README b/README
index 8811f03..111cdf2 100644
--- a/README
+++ b/README
@@ -5,7 +5,7 @@ girara user interface library and several document libraries.
 
 Requirements
 ------------
-gtk2 (>= 2.18)
+gtk2 (>= 2.18) or gtk3
 glib (>= 2.28)
 girara
 sqlite3 (optional, >= 3.5.9)