diff --git a/schema.graphql b/schema.graphql
index b4d6733..6fdf337 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -26,6 +26,7 @@ type Auction @entity {
     endsAt: BigInt
     endsAtOriginal: BigInt
     claimAt: BigInt
+    createdBlock: BigInt!
 
     quantity: BigInt
     presetId: Int
diff --git a/src/mapping.ts b/src/mapping.ts
index 5ecd4e0..3b6724d 100644
--- a/src/mapping.ts
+++ b/src/mapping.ts
@@ -336,6 +336,7 @@ export function handleAuction_Initialized(
         auction.stepMin = presets.stepMin;
         auction.seller = auctionInfo.owner;
         auction.createdAt = event.block.timestamp;
+        auction.createdBlock = event.block.number;
         auction.quantity = event.params._tokenAmount;
         auction.startsAt = event.block.timestamp;
         auction.dueIncentives = auctionInfo.dueIncentives;
diff --git a/subgraph.yaml b/subgraph.yaml
index 774a35f..1d66b28 100644
--- a/subgraph.yaml
+++ b/subgraph.yaml
@@ -11,7 +11,7 @@ dataSources:
       startBlock: 36176058
     mapping:
       kind: ethereum/events
-      apiVersion: 0.0.5
+      apiVersion: 0.0.6
       language: wasm/assemblyscript
       entities:
         - AuctionCancelled