diff --git a/dsc-bicep-ext/build.rs b/dsc-bicep-ext/build.rs
index ae8c430da..7d66e7fec 100644
--- a/dsc-bicep-ext/build.rs
+++ b/dsc-bicep-ext/build.rs
@@ -4,6 +4,10 @@
 use std::{env, path::PathBuf};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Prevent this build script from rerunning unless the proto file or build script changes.
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=proto/bicep.proto");
+
     let descriptor_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("bicep.bin");
 
     tonic_prost_build::configure()