diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8dc45c2e..e6bff518 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,8 +10,10 @@ jobs:
       matrix:
         go-version:
           - stable
+          - 1.21.x
           - 1.20.x
           - 1.19.x
+          - 1.18.x
           - 1.17.x
           - 1.16.x
           - 1.15.x