diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..7c76170
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,5 @@
+[toolchain]
+# The default profile includes rustc, rust-std, cargo, rust-docs, rustfmt and clippy.
+# https://rust-lang.github.io/rustup/concepts/profiles.html
+profile = "default"
+channel = "stable"
diff --git a/rustfmt.toml b/rustfmt.toml
index c77ef33..99dd530 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,3 +1,4 @@
-version = "Two"
 edition = "2021"
 tab_spaces = 2
+newline_style = "Unix"
+max_width = 100