diff --git a/lib/controllers/dashboard.js b/lib/controllers/dashboard.js
index bf4a309..1cfddb0 100644
--- a/lib/controllers/dashboard.js
+++ b/lib/controllers/dashboard.js
@@ -16,7 +16,7 @@ async function get(request, response) {
   const { application } = request.app.locals;
 
   try {
-    const [sources, blogs, blogCount, itemCount, syncStatus] = await Promise.all([
+    const [rawSources, blogs, blogCount, itemCount, syncStatus] = await Promise.all([
       getSources(application),
       getBlogs(application, { limit: 10 }),
       countBlogs(application),
@@ -24,6 +24,16 @@ async function get(request, response) {
       getSyncStatus(application),
     ]);
 
+    // Convert Date objects to ISO strings for template date filter compatibility
+    const sources = rawSources.map((source) => ({
+      ...source,
+      lastSyncAt: source.lastSyncAt
+        ? (source.lastSyncAt instanceof Date
+            ? source.lastSyncAt.toISOString()
+            : source.lastSyncAt)
+        : null,
+    }));
+
     // Get blogs with errors
     const errorBlogs = await getBlogs(application, { includeHidden: true, limit: 100 });
     const blogsWithErrors = errorBlogs.filter((b) => b.status === "error");
diff --git a/lib/sync/scheduler.js b/lib/sync/scheduler.js
index d1a9646..5b222d8 100644
--- a/lib/sync/scheduler.js
+++ b/lib/sync/scheduler.js
@@ -150,12 +150,19 @@ export async function getSyncStatus(application) {
     db.collection("blogrollMeta").findOne({ key: "syncStats" }),
   ]);
 
+  // Convert Date to ISO string for template date filter compatibility
+  const lastSync = syncStats?.lastFullSync
+    ? (syncStats.lastFullSync instanceof Date
+        ? syncStats.lastFullSync.toISOString()
+        : syncStats.lastFullSync)
+    : null;
+
   return {
     status: "ok",
     isRunning,
     blogs: { count: blogCount },
     items: { count: itemCount },
-    lastSync: syncStats?.lastFullSync || null,
+    lastSync,
     lastSyncStats: syncStats || null,
   };
 }
diff --git a/package.json b/package.json
index 134e565..f0253b0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rmdes/indiekit-endpoint-blogroll",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Blogroll endpoint for Indiekit. Aggregates blog feeds from OPML, JSON feeds, or manual entry.",
   "keywords": [
     "indiekit",