diff --git a/README.md b/README.md
index cb2e6427d61c5..fb45cd5619e50 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,11 @@ cargo test
 cargo doc --open
 cargo build [--release]
 ```
+**Tip**: If you encounter the following error when building the project, please update your Rust toolchain with `rustup update`.
+
+```
+error[E0658]: use of unstable library feature 'map_into_keys_values'
+```
 
 ### CLI Help