diff --git a/src/app/api/postcode/LookupOsPlaces.ts b/src/app/api/postcode/LookupOsPlaces.ts
index 1bdf590..7a8d320 100644
--- a/src/app/api/postcode/LookupOsPlaces.ts
+++ b/src/app/api/postcode/LookupOsPlaces.ts
@@ -24,9 +24,9 @@ async function fetchOsPlacesPage(
   retries: number,
   delay: number
 ): Promise<{ status: number; data?: OSPlacesResponse; error?: string }> {
-  const url = `${OS_API_URL}?postcode=${encodeURIComponent(
+  const url = `https://api.os.uk/search/places/v1/postcode?postcode=${encodeURIComponent(
     postcode
-  )}&key=${OS_API_KEY}&maxresults=${maxResults}&offset=${offset}`;
+  )}&dataset=DPA,LPI&maxresults=100&offset=${offset}&key=${process.env.OS_API_KEY}`;
 
   try {
     const res = await fetch(url, { method: "GET" });
diff --git a/src/app/api/postcode/[postcode]/addresses/route.ts b/src/app/api/postcode/[postcode]/addresses/route.ts
index 0a4c9c6..08886f0 100644
--- a/src/app/api/postcode/[postcode]/addresses/route.ts
+++ b/src/app/api/postcode/[postcode]/addresses/route.ts
@@ -53,10 +53,20 @@ export async function GET(
     const addresses = mapOsPlacesToFlat(result.results);
     const total = result.data.header?.totalresults ?? addresses.length;
 
-    await db.insert(postcodeSearch).values({
-      postcode: postcode,
-      resultData: result.data,
-    });
+    // We shouldn't really run into conflicts here, but just in case, we allow for an update
+    await db
+      .insert(postcodeSearch)
+      .values({
+        postcode,
+        resultData: result.data,
+      })
+      .onConflictDoUpdate({
+        target: postcodeSearch.postcode,
+        set: {
+          resultData: result.data,
+          createdAt: new Date(), // update timestamp
+        },
+      });
 
     // Step 4: return results
     return NextResponse.json({