diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5a51401..630c3ed 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -16,7 +16,7 @@ jobs:
       matrix:
         version:
           - '1.9'
-          - 'nightly'
+          - 'pre'
         os:
           - ubuntu-latest
           - macOS-latest