diff --git a/scripts/build_runtime_package.py b/scripts/build_runtime_package.py
index 82b1090c..d4eedde2 100755
--- a/scripts/build_runtime_package.py
+++ b/scripts/build_runtime_package.py
@@ -54,6 +54,7 @@ TOP_LEVEL_MODULES = {
     "a2a_client",
     "a2a_executor",
     "a2a_mcp_server",
+    "a2a_response",
     "a2a_tools",
     "a2a_tools_delegation",
     "a2a_tools_inbox",