diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index f12f5f1b..f32b3197 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -20,7 +20,7 @@ jobs:
       matrix:
         version: ['1.10', 'pre']
         os: ['ubuntu-latest']
-        arch: [x64]s
+        arch: [x64]
     steps:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@v1