diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 00000000..a82ade34
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,4 @@
+[toolchain]
+channel = "stable"
+components = ["rustfmt"]
+targets = ["wasm32-unknown-unknown"]