diff --git a/.cargo/config.toml b/.cargo/config.toml
index b615045..bac0add 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,6 +1,6 @@
 # Just used for rust-analyzer.
 [build]
-# target = "riscv64gc-unknown-none-elf"
+target = "riscv64gc-unknown-none-elf"
 # target = 'aarch64-unknown-none-softfloat'
 # target = 'x86_64-unknown-none'
 # target = 'loongarch64-unknown-none'
diff --git a/.github/workflows/doc.yaml b/.github/workflows/doc.yaml
index ae859a8..02f4d64 100644
--- a/.github/workflows/doc.yaml
+++ b/.github/workflows/doc.yaml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: dtolnay/rust-toolchain@stable
+    - uses: dtolnay/rust-toolchain@nightly
     - name: generate doc
       run: cargo doc --no-deps --all-features
     - name: Deploy to Github Pages
@@ -20,4 +20,4 @@ jobs:
       with:
         single-commit: true
         branch: gh-pages
-        folder: target/doc
\ No newline at end of file
+        folder: target/riscv64gc-unknown-none-elf/doc
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..0c59087
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,8 @@
+[toolchain]
+profile = "minimal"
+# channel = "nightly-2023-03-29"
+channel = "nightly-2023-12-01"
+components = ["rust-src", "rustfmt", "clippy"]
+targets = [
+    "riscv64imac-unknown-none-elf",
+]