diff --git a/.nvmrc b/.nvmrc
index bf79505..535e1cc 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v16.14.0
+v22.6.0
diff --git a/package.json b/package.json
index d0295e7..9feb658 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "eleventy-plus-vite",
   "version": "1.2.0",
-	"type": "module",
+  "type": "module",
   "description": "A clean and simple Eleventy 2 Starter Kit with Vite",
   "browserslist": [
     "> 0.5%",
@@ -30,26 +30,26 @@
     "@11ty/eleventy": "^3.0.0-alpha.14",
     "@11ty/eleventy-img": "^4.0.2",
     "@11ty/eleventy-navigation": "^0.3.5",
-    "@11ty/eleventy-plugin-rss": "^1.2.0",
+    "@11ty/eleventy-plugin-rss": "^2.0.2",
     "@11ty/eleventy-plugin-syntaxhighlight": "^5.0.0",
     "@11ty/eleventy-plugin-vite": "^5.0.0-alpha.1",
-    "autoprefixer": "^10.4.16",
-    "cssnano": "^6.0.1",
+    "autoprefixer": "^10.4.20",
+    "cssnano": "^7.0.5",
     "cssremedy": "^0.1.0-beta.2",
     "del-cli": "^5.1.0",
-    "eslint": "^8.54.0",
-    "eslint-config-standard": "^17.0.0",
-    "eslint-plugin-import": "^2.26.0",
-    "eslint-plugin-n": "^16.3.1",
-    "eslint-plugin-promise": "^6.0.0",
-    "focus-visible": "^5.2.0",
-    "luxon": "^3.4.4",
-    "markdown-it": "^14.0.0",
-    "markdown-it-anchor": "^8.6.7",
+    "eslint": "^8.57.0",
+    "eslint-config-standard": "^17.1.0",
+    "eslint-plugin-import": "^2.29.1",
+    "eslint-plugin-n": "^16.6.2",
+    "eslint-plugin-promise": "^6.6.0",
+    "focus-visible": "^5.2.1",
+    "luxon": "^3.5.0",
+    "markdown-it": "^14.1.0",
+    "markdown-it-anchor": "^9.0.1",
     "npm-run-all": "^4.1.5",
-    "postcss-nesting": "^12.0.1",
+    "postcss-nesting": "^13.0.0",
     "rollup-plugin-critical": "^1.0.13",
-    "sass": "^1.69.5",
-    "vite": "^5.3.3"
+    "sass": "^1.77.8",
+    "vite": "^5.4.1"
   }
 }
diff --git a/src/feed.xml.njk b/src/feed.xml.njk
index 44edd3a..deedc8c 100644
--- a/src/feed.xml.njk
+++ b/src/feed.xml.njk
@@ -12,7 +12,7 @@ eleventyExcludeFromCollections: true
         <name>{{ meta.title }}</name>
     </author>
     {% if collections.posts %}
-    <updated>{{ collections.posts | rssLastUpdatedDate }}</updated>
+    <updated>{{ collections.posts | getNewestCollectionItemDate | dateToRfc3339 }}</updated>
     {% endif %}
     <id>{{ meta.url }}/</id>
     {%- for post in collections.posts | reverse -%}
@@ -20,7 +20,7 @@ eleventyExcludeFromCollections: true
         <entry>
             <title>{{ post.data.title }}</title>
             <link href="{{ absolutePostUrl }}"/>
-            <updated>{{ post.date | rssDate }}</updated>
+            <updated>{{ post.date | dateToRfc3339 }}</updated>
             <id>{{ absolutePostUrl }}</id>
             <content type="html"><![CDATA[
                 {{ post.templateContent | htmlToAbsoluteUrls(absolutePostUrl) | safe }}