diff --git a/contracts/examples/adder/rust-toolchain.toml b/contracts/examples/adder/rust-toolchain.toml
new file mode 100644
index 0000000000..7bf0360286
--- /dev/null
+++ b/contracts/examples/adder/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "nightly-2024-05-22"
\ No newline at end of file