diff --git a/ggdt/Cargo.toml b/ggdt/Cargo.toml
index 65455e2..47bed8d 100644
--- a/ggdt/Cargo.toml
+++ b/ggdt/Cargo.toml
@@ -13,7 +13,7 @@ rand = "0.8.5"
 num = "0.4.0"
 num-derive = "0.3.3"
 num-traits = "0.2.15"
-bitflags = "2.0.2"
+bitflags = "2.1.0"
 flate2 = "1.0.25"
 crc32fast = "1.3.2"