diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 595af22..964a22c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.9'
+          - '1'
         os:
           - ubuntu-latest
         arch: