diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index af92bdd..0000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-1.63.0
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..07d72a9
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "1.63.0"
+components = [ "rustfmt" ]