diff --git a/syntex_syntax/Cargo.toml b/syntex_syntax/Cargo.toml
index ef19715d..d03e43ef 100644
--- a/syntex_syntax/Cargo.toml
+++ b/syntex_syntax/Cargo.toml
@@ -8,7 +8,7 @@ repository = "https://github.com/serde-rs/syntex"
 include = ["Cargo.toml", "src/**/*.rs"]
 
 [dependencies]
-bitflags = "^0.5.0"
+bitflags = "^0.7.0"
 libc = "^0.2.13"
 log = "^0.3.6"
 rustc-serialize = "^0.3.16"