diff --git a/target_chains/sui/contracts/rust-toolchain.toml b/target_chains/sui/contracts/rust-toolchain.toml
new file mode 100644
index 0000000000..83025f9721
--- /dev/null
+++ b/target_chains/sui/contracts/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.77.0"