diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index dc13804c63..7dbf4900ac 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -64,7 +64,10 @@ jobs:
           lfs: true
       - name: Install rust toolchain
         # The script for rustdoc build requires nightly toolchain.
-        uses: dtolnay/rust-toolchain@nightly
+        uses: dtolnay/rust-toolchain@master
+        with:
+          # TODO 24-02-06: this is pinned due to tkaitchuck/aHash#200.
+          toolchain: nightly-2024-02-01
       - name: Load rust cache
         uses: astriaorg/buildjet-rust-cache@v2.5.1
       - name: Build rustdocs