diff --git a/.github/workflows/stack.yml b/.github/workflows/stack.yml
index f537bef..7024648 100644
--- a/.github/workflows/stack.yml
+++ b/.github/workflows/stack.yml
@@ -12,8 +12,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - resolver: lts-9   # GHC 8.0
-          - resolver: lts-11  # GHC 8.2
           - resolver: lts-12  # GHC 8.4
           - resolver: lts-14  # GHC 8.6
           - resolver: lts-16  # GHC 8.8
@@ -22,6 +20,7 @@ jobs:
           - resolver: lts-20  # GHC 9.2
           - resolver: lts-21  # GHC 9.4
           - resolver: lts-22  # GHC 9.6
+          - resolver: lts-23  # GHC 9.8
 
     steps:
       - name: Clone project