diff --git a/pkgs/json_rpc_2/.gitignore b/pkgs/json_rpc_2/.gitignore
index 7dbf0350d..ab3cb76e6 100644
--- a/pkgs/json_rpc_2/.gitignore
+++ b/pkgs/json_rpc_2/.gitignore
@@ -1,5 +1,6 @@
 # Don’t commit the following directories created by pub.
 .buildlog
+.dart_tool/
 .pub/
 build/
 packages
@@ -12,4 +13,4 @@ packages
 *.js.map
 
 # Include when developing application packages.
-pubspec.lock
\ No newline at end of file
+pubspec.lock