diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index dee1d51..f346770 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -38,7 +38,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Install Rust
-      run: rustup update nightly --component miri && rustup default nightly
+      run: rustup toolchain install nightly --component miri && rustup default nightly
     - run: cargo miri test
       env:
         MIRIFLAGS: -Zmiri-strict-provenance -Zmiri-symbolic-alignment-check -Zmiri-disable-isolation