diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7f7787229..27d07b95b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # 4.0.0
 
+## Misc
+
+- Enable both in App and email notifications for `previousTopBidder` in NFT Open Auction.
+
+# 4.0.0
+
 This is Creator Tokens (CRT) release. It introduces the CRT mappings, custom resolvers and mutations.
 
 # 3.7.0
diff --git a/package-lock.json b/package-lock.json
index da6be0015..33ddfd817 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "orion",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "orion",
-      "version": "4.0.0",
+      "version": "4.0.1",
       "hasInstallScript": true,
       "workspaces": [
         "network-tests"
diff --git a/package.json b/package.json
index 7a5583828..296b8ed6d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "orion",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "engines": {
     "node": ">=16"
   },
diff --git a/src/mappings/content/utils.ts b/src/mappings/content/utils.ts
index 1622116d2..ea83f2eae 100644
--- a/src/mappings/content/utils.ts
+++ b/src/mappings/content/utils.ts
@@ -466,10 +466,12 @@ export async function createBid(
     auction.auctionType.isTypeOf === 'AuctionTypeEnglish'
   ) {
     newBid.previousTopBidId = previousTopBidId
-    return { bid: newBid, auction, previousTopBid, auctionBids }
   }
 
-  return { bid: newBid, auction, auctionBids }
+  // Although there is no notion of a "previousTopBid" in the OpenAuction type
+  // as all active bids are considered valid, but we still return it whether the
+  // auction type is "Open" or "English" for notification purposes.
+  return { bid: newBid, auction, previousTopBid, auctionBids }
 }
 
 export async function getChannelOwnerMemberByVideoId(