diff --git a/common/build.rs b/common/build.rs
index efedbfb..faf1706 100644
--- a/common/build.rs
+++ b/common/build.rs
@@ -217,5 +217,29 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
             ],
             &["proto"],
         )?;
+
+    // Scope build-script reruns to the actual inputs. Without this, the script
+    // emits no `rerun-if-changed` directives, so Cargo reruns it whenever any
+    // file in the package changes. Since codegen writes into `src/proto/`, that
+    // self-write retriggers the script on every build (an infinite loop under
+    // `cargo watch`). tonic_build 0.13 emitted these automatically; 0.14
+    // (tonic_prost_build) no longer does.
+    println!("cargo:rerun-if-changed=build.rs");
+    for proto in [
+        "proto/common.proto",
+        "proto/adresar.proto",
+        "proto/auth.proto",
+        "proto/search.proto",
+        "proto/search2.proto",
+        "proto/table_definition.proto",
+        "proto/table_script.proto",
+        "proto/table_structure.proto",
+        "proto/table_validation.proto",
+        "proto/tables_data.proto",
+        "proto/uctovnictvo.proto",
+    ] {
+        println!("cargo:rerun-if-changed={proto}");
+    }
+
     Ok(())
 }