diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a97fc89..f6823bd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,16 +16,14 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - racket-version: '8.16'
-            racket-variant: 'BC'
-          - racket-version: '8.16'
-            racket-variant: 'CS'
           - racket-version: '8.17'
             racket-variant: 'BC'
           - racket-version: '8.17'
             racket-variant: 'CS'
           - racket-version: '8.18'
             racket-variant: 'CS'
+          - racket-version: '9.0'
+            racket-variant: 'CS'
 
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8