diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4aa334c9..565cf8cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,6 +42,8 @@ jobs:
           - 1.4.1
           - 1.5.1
           - 1.6.2
+          - 1.7.3
+          - 1.8.1
         include:
           - crystal: nightly
             stable: false