diff --git a/schema.graphql b/schema.graphql
index 1c67e5f..e8edfc2 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -15,5 +15,5 @@ type UserBond @entity{
   id: ID! 
   ref: String!,
   height: BigInt!,
-  date: Date!
+  ts: BigInt!
 }
\ No newline at end of file
diff --git a/src/mappings/mappingHandlers.ts b/src/mappings/mappingHandlers.ts
index db51e2b..10c8b74 100644
--- a/src/mappings/mappingHandlers.ts
+++ b/src/mappings/mappingHandlers.ts
@@ -158,6 +158,6 @@ export async function handleBondExecution(
     id: msg.msg.decodedMsg.sender,
     ref: referral,
     height: BigInt(msg.block.header.height),
-    date: new Date(msg.block.header.time.getTime())
+    ts: BigInt(msg.block.header.time.getTime())
   })).save();
 }
\ No newline at end of file