diff --git a/rewriter/rust-toolchain.toml b/rewriter/rust-toolchain.toml
new file mode 100644
index 0000000..d1e334d
--- /dev/null
+++ b/rewriter/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "nightly"
+targets = [ "wasm32-unknown-unknown" ] 
\ No newline at end of file