diff --git a/Cargo.toml b/Cargo.toml
index 0c36b41e..4869ef94 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ members = [
   "src/bare-metal/useful-crates/zerocopy-example",
   "src/exercises/concurrency/chat-async",
 ]
+resolver = "2"