diff --git a/format/Cargo.toml b/format/Cargo.toml
index 4a008f6..931a730 100644
--- a/format/Cargo.toml
+++ b/format/Cargo.toml
@@ -10,7 +10,7 @@ license = "MIT"
 [dependencies]
 rustpython-literal = { workspace = true }
 
-bitflags = "2.2.1"
+bitflags = "2.3.1"
 itertools = "0.10.5"
 num-bigint = { workspace = true }
 num-traits = { workspace = true }