diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5749586..2c09d28 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -59,10 +59,10 @@ jobs:
           node-version: 20
           cache: yarn
       - name: Install
-        uses: dtolnay/rust-toolchain@stable
+        uses: dtolnay/rust-toolchain@1.77
         if: ${{ !matrix.settings.docker }}
         with:
-          toolchain: stable
+          toolchain: 1.77
           targets: ${{ matrix.settings.target }}
       - name: Cache cargo
         uses: actions/cache@v4