diff --git a/creachadair-imath-sys/Cargo.toml b/creachadair-imath-sys/Cargo.toml
index 3e8d212..d4f3731 100644
--- a/creachadair-imath-sys/Cargo.toml
+++ b/creachadair-imath-sys/Cargo.toml
@@ -16,7 +16,7 @@ include = ["src/*", "vendor/imath/*.{c,h}", "Cargo.toml", "build.rs", "tests/"]
 
 [build-dependencies]
 cc = "1.0.67"
-bindgen = { version = "0.72.0", default-features = false, features = [
+bindgen = { version = "0.73.1", default-features = false, features = [
   "runtime",
 ] }
 dunce = "1.0.1"