diff --git a/build.gradle b/build.gradle
index 3ec52e6..a715afc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,7 +31,7 @@ dependencies {
     implementation 'org.dom4j:dom4j:2.1.3'
     implementation 'org.apache.commons:commons-text:1.10.0'
 
-    implementation platform('run.halo.tools.platform:plugin:2.5.0-SNAPSHOT')
+    implementation platform('run.halo.tools.platform:plugin:2.9.0-SNAPSHOT')
     compileOnly 'run.halo.app:api'
 
     testImplementation 'run.halo.app:api'
diff --git a/src/main/java/run/halo/feed/FeedServiceImpl.java b/src/main/java/run/halo/feed/FeedServiceImpl.java
index 9571fd6..2907e2d 100644
--- a/src/main/java/run/halo/feed/FeedServiceImpl.java
+++ b/src/main/java/run/halo/feed/FeedServiceImpl.java
@@ -19,6 +19,8 @@
 import run.halo.app.infra.SystemSetting;
 
 import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.util.Objects;
 
 @Service
@@ -135,9 +137,9 @@ private Mono<FeedContext> getFeedContext(ServerRequest request) {
                 Assert.notNull(basicPluginSetting.getDescriptionType(),
                     "descriptionType cannot be null");
 
-                var externalUrl = externalUrlSupplier.get();
-                if (!externalUrl.isAbsolute()) {
-                    externalUrl = request.exchange().getRequest().getURI().resolve(externalUrl);
+                var externalUrl = externalUrlSupplier.getRaw();
+                if (externalUrl == null) {
+                    externalUrl = externalUrlSupplier.getURL(request.exchange().getRequest());
                 }
                 // Build feed context
                 return new FeedContext(basicPluginSetting, systemBasicSetting, externalUrl);
@@ -155,13 +157,17 @@ private Mono<ServerResponse> postListResultToXmlServerResponse(
                 if (permalink != null) {
                     var permalinkUri = URI.create(permalink);
                     if (!permalinkUri.isAbsolute()) {
-                        permalinkUri = feedContext.externalUrl.resolve(permalinkUri);
+                        try {
+                            permalinkUri = feedContext.externalUrl.toURI().resolve(permalinkUri);
+                        } catch (URISyntaxException e) {
+                            throw new RuntimeException(e);
+                        }
                     }
                     permalink = permalinkUri.toString();
                 }
                 var itemBuilder = RSS2.Item.builder()
                     .title(post.getSpec().getTitle())
-                    .link(permalink)
+                    .link(feedContext.externalUrl.toString() + permalink)
                     .pubDate(post.getSpec().getPublishTime())
                     .guid(post.getStatusOrDefault().getPermalink());
 
@@ -207,6 +213,6 @@ private RSS2 buildBaseRss(FeedContext feedContext) {
     }
 
     record FeedContext(BasicSetting basicPluginSetting, SystemSetting.Basic systemBasicSetting,
-                       URI externalUrl) {
+                       URL externalUrl) {
     }
 }
diff --git a/src/main/resources/plugin.yaml b/src/main/resources/plugin.yaml
index 79ba8f5..7d9b334 100644
--- a/src/main/resources/plugin.yaml
+++ b/src/main/resources/plugin.yaml
@@ -9,7 +9,7 @@ metadata:
 spec:
   enabled: true
   version: 1.1.1
-  requires: ">=2.4.0"
+  requires: ">=2.7.0"
   author:
     name: Halo OSS Team
     website: https://github.com/halo-dev