diff --git a/.github/workflows/rust-ci.yml b/.github/workflows/rust-ci.yml
index 65745fb..f4597c3 100644
--- a/.github/workflows/rust-ci.yml
+++ b/.github/workflows/rust-ci.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         toolchain: [stable, beta, nightly]
 
     steps: