diff --git a/.github/workflows/package-osx-legacy.yml b/.github/workflows/package-osx-legacy.yml
index 3a2e71f..f4916dd 100644
--- a/.github/workflows/package-osx-legacy.yml
+++ b/.github/workflows/package-osx-legacy.yml
@@ -29,7 +29,7 @@ jobs:
       # We need the official Python, because the GA ones only support newer macOS versions
       # The deployment target is picked up by the Python build tools automatically
       PYTHON_VERSION: 3.11.9
-      MACOSX_DEPLOYMENT_TARGET: '10.13'
+      MACOSX_DEPLOYMENT_TARGET: '10.14'
     steps:
       - uses: actions/checkout@v5
       - name: Get Python
diff --git a/setup.py b/setup.py
index 1d7bd1c..93cbf53 100644
--- a/setup.py
+++ b/setup.py
@@ -38,8 +38,9 @@ class BuildBinaryCommand(setuptools.Command):
         if sys.platform == 'darwin':
             os.system('pyinstaller --hidden-import=_cffi_backend -y -D -i icons/comic2ebook.icns -n "Kindle Comic Converter" -w -s kcc.py')
             # TODO /usr/bin/codesign --force -s "$MACOS_CERTIFICATE_NAME" --options runtime dist/Applications/Kindle\ Comic\ Converter.app -v
-            if os.getenv('MACOSX_DEPLOYMENT_TARGET') == '10.13':
-                os.system(f'appdmg kcc.json dist/kcc_osx_10_13_legacy_{VERSION}.dmg')
+            MACOS = os.getenv('MACOSX_DEPLOYMENT_TARGET')
+            if MACOS:
+                os.system(f'appdmg kcc.json dist/kcc_osx_{MACOS.replace(".", "_")}_legacy_{VERSION}.dmg')
             else:
                 os.system(f'appdmg kcc.json dist/kcc_macos_{platform.processor()}_{VERSION}.dmg')
             sys.exit(0)