diff --git a/rust/build.rs b/rust/build.rs
index 4cbb317..5dbb4a5 100644
--- a/rust/build.rs
+++ b/rust/build.rs
@@ -7,5 +7,6 @@ fn main() {
         .output()
         .unwrap();
     let git_hash = String::from_utf8(output.stdout).unwrap();
+    println!("cargo:rustc-rerun-if-changed=.git/HEAD");
     println!("cargo:rustc-env=GIT_HASH={}", git_hash);
 }