diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b5a6cfa..2558db3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,7 +37,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.9'
+          - '1.8'
         os:
           - ubuntu-latest
           - macOS-latest