diff --git a/tools/aconfig/Cargo.toml b/tools/aconfig/Cargo.toml
index 535ff21..970fdcf 100644
--- a/tools/aconfig/Cargo.toml
+++ b/tools/aconfig/Cargo.toml
@@ -6,3 +6,5 @@
     "aconfig_storage_file",
     "printflags"
 ]
+
+resolver = "2"