diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2a6cda6a..544116eb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         version:
           - '1.2'
-          - '1.5'
+          - '1'
         os:
           - ubuntu-latest
           - macOS-latest