diff --git a/Cargo.toml b/Cargo.toml
index b55e70f6..137cbd11 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ members = [ "xrbk", "xrbk_macro" ]
 
 [dependencies]
 xrbk = { path = "./xrbk" } # (de)serialization
-bitflags = "1.3" # bit masks - representations of masks
+bitflags = "2.0" # bit masks - representations of masks
 array-init = "2.1.0" # easy array initialization
 thiserror = "1" # error handling
 derive_more = "0.99" # derive more useful traits