diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af39186680..c55d2b41f3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -59,7 +59,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: nightly
+          toolchain: nightly-2023-10-10
           components: rustfmt
           override: true
       - name: external-type-check