diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9e3446f..c4614838 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,7 +69,7 @@ jobs:
       - name: Setup
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: nightly
           default: true
           components: rustfmt