diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 71ad073..14403c3 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -18,7 +18,7 @@ jobs:
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
-    runs-on: macos-14
+    runs-on: macos-15
     steps:
       - uses: actions/checkout@v4
       - name: Build Docs
diff --git a/Package.swift b/Package.swift
index bd4e26e..a4a9d88 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version: 5.8
+// swift-tools-version: 6.0
 //
 //  Package.swift
 //  LevenshteinTransformations
diff --git a/Sources/LevenshteinTransformations/LevenshteinTransformations.docc/theme-settings.json b/Sources/LevenshteinTransformations/LevenshteinTransformations.docc/theme-settings.json
index a297694..8f4c201 100644
--- a/Sources/LevenshteinTransformations/LevenshteinTransformations.docc/theme-settings.json
+++ b/Sources/LevenshteinTransformations/LevenshteinTransformations.docc/theme-settings.json
@@ -11,7 +11,6 @@
             "button-text": "#ffffff",
             "header": "#323F80",
             "documentation-intro-accent": "var(--color-header)",
-            "documentation-intro-fill": "radial-gradient(circle at top, var(--color-header) 30%, #000 100%)",
             "link": "#3490EC",
             "nav-link-color": "#3490EC",
             "nav-dark-link-color": "#3490EC",