diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 2930543..1a7463b 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -12,11 +12,12 @@ jobs:
     strategy:
       matrix:
         perl-version:
+          - '5.40'
           - '5.38'
           - '5.18'
           - '5.10'
     container:
-      image: perl:${{ matrix.perl-version }}
+      image: perl:${{ matrix.perl-version }}-buster
     steps:
       - uses: actions/checkout@v4
       - name: perl -V
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 46d3b78..aeeb5db 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -12,6 +12,7 @@ jobs:
     strategy:
       matrix:
         perl-version:
+          - '5.40'
           - '5.38'
           - '5.18'
           - '5.10'
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 8010cb5..3f3a2ca 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -13,6 +13,7 @@ jobs:
       fail-fast: true
       matrix:
         perl-version:
+          # - '5.40' Not yet for windows.
           - '5.38'
           - '5.14'
     steps: