diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 194ff07..d6e878c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -24,7 +24,7 @@ jobs:
       matrix:
         version:
           - '1.11'
-          - '1.9'
+          - '1.10'
           - 'pre'
         os:
           - ubuntu-latest