diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index afe1af36..72e6be2a 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -11,6 +11,7 @@ jobs:
       matrix:
         version:
           - '1'
+          - '1.6'
           # - 'nightly'
         os:
           - ubuntu-latest