diff --git a/pyproject.toml b/pyproject.toml
index 1844c61d..41d6de87 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ requires = [
   # versions can't work with code that was generated with newer versions.
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#backwards
   "protobuf == 6.31.1",
-  "grpcio-tools == 1.72.1",
+  "grpcio-tools == 1.78.0",
   "grpcio == 1.72.1",
 ]
 build-backend = "setuptools.build_meta"