diff --git a/sys/Cargo.toml b/sys/Cargo.toml
index 45667f2..6a73e92 100644
--- a/sys/Cargo.toml
+++ b/sys/Cargo.toml
@@ -22,7 +22,7 @@ libc = "0.2"
 num_cpus   = "1.11"
 cc         = "1.0"
 pkg-config = "0.3"
-bindgen    = "0.55"
+bindgen    = "0.56"
 
 [target.'cfg(target_env = "msvc")'.build-dependencies]
 vcpkg = "0.2"