diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 04be394..7dd369b 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -33,7 +33,7 @@ jobs:
       - uses: actions-rs/toolchain@v1.0.6
         with:
           profile: minimal
-          toolchain: nightly
+          toolchain: nightly-2023-05-20
           override: true
 
       - uses: actions/cache@v3.3.1