diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index 0d488f7..0000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-nightly-2025-03-22
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..78cd71c
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "nightly-2025-03-22"
+