diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bb75b5c..e7d545b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,8 +9,17 @@ open a PR that references it.
 Prerequisites: a stable Rust toolchain, the `wasm32v1-none` target (for the
 contract), and Node.js 22+ (for `client/`).
 
-```bash
-rustup target add wasm32v1-none
+The Rust toolchain, its components (`rustfmt`, `clippy`), and the `wasm32v1-none`
+target are pinned in [`rust-toolchain.toml`](rust-toolchain.toml). When using
+`rustup`, invoking any `cargo` command inside the repo automatically installs
+and selects the pinned version.
+
+### Bumping the Rust Toolchain
+To bump the Rust version:
+1. Update `channel = "..."` in `rust-toolchain.toml` to the new target version.
+2. Run `cargo fmt --all -- --check` and `cargo clippy --workspace --all-targets --locked -- -D warnings` to verify new lints.
+3. Verify tests and the wasm build: `cargo test --workspace --locked` and `cargo build -p deprader-router --target wasm32v1-none --release --locked`.
+4. Update `PROGRESS.md` and submit a PR with the bump.
 
 # Off-chain toolkit + contract unit tests
 cargo test --workspace --locked
diff --git a/PROGRESS.md b/PROGRESS.md
index bab63fb..2d431eb 100644
--- a/PROGRESS.md
+++ b/PROGRESS.md
@@ -319,3 +319,11 @@ is closed — see [CONTRIBUTING.md](CONTRIBUTING.md).
 - **By:** ALLEN-AYODEJI
 - **Closes:** N/A
 - **Status:** Merged.
+
+### Devex — Pin the Rust toolchain
+
+- **What:** Adds `rust-toolchain.toml` pinning the Rust compiler channel to `1.94.1` with `rustfmt`, `clippy` components and the `wasm32v1-none` Soroban contract compilation target. Updates `CONTRIBUTING.md` with instructions on how contributors and maintainers can bump the pinned toolchain.
+- **Verified:** `cargo fmt --all -- --check`, `cargo clippy --workspace --all-targets --locked -- -D warnings`, `cargo test --workspace --locked`, and `cargo build -p deprader-router --target wasm32v1-none --release --locked` all pass under the pinned toolchain.
+- **By:** dezzy-music
+- **Closes:** #159
+- **Status:** PR open.
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..352f1f7
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,5 @@
+[toolchain]
+channel = "1.94.1"
+components = ["rustfmt", "clippy"]
+targets = ["wasm32v1-none"]
+profile = "minimal"