diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 13af3f7..0d7f63b 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -17,7 +17,7 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.7'
+          - '1.9'
           - 'nightly'
         os:
           - ubuntu-latest