diff --git a/packages/core/src/positions/fetchLiquidityPositions/fetchClaimableAmount.ts b/packages/core/src/positions/fetchLiquidityPositions/fetchClaimableAmount.ts
index fdd83a4..3ef33d4 100644
--- a/packages/core/src/positions/fetchLiquidityPositions/fetchClaimableAmount.ts
+++ b/packages/core/src/positions/fetchLiquidityPositions/fetchClaimableAmount.ts
@@ -1,23 +1,22 @@
 import { NonfungiblePositionManager } from '@nftx/abi';
-import { NONFUNGIBLE_POSITION_MANAGER, Zero } from '@nftx/constants';
-import type { Provider, TokenId } from '@nftx/types';
-import { getChainConstant } from '@nftx/utils';
+import { Zero } from '@nftx/constants';
+import type { Address, Provider, TokenId } from '@nftx/types';
 
 const MAX_UINT128 = 340282366920938463463374607431768211455n;
 
 const fetchClaimableAmount = async ({
-  network,
   tokenId,
   provider,
+  manager,
 }: {
   provider: Provider;
-  network: number;
   tokenId: TokenId;
+  manager: Address;
 }): Promise<[bigint, bigint]> => {
   try {
     const ownerAddress = await provider.readContract({
       abi: NonfungiblePositionManager,
-      address: getChainConstant(NONFUNGIBLE_POSITION_MANAGER, network),
+      address: manager,
       functionName: 'ownerOf',
       args: [BigInt(tokenId)],
     });
@@ -26,7 +25,7 @@ const fetchClaimableAmount = async ({
       result: [amount0, amount1],
     } = await provider.simulateContract({
       abi: NonfungiblePositionManager,
-      address: getChainConstant(NONFUNGIBLE_POSITION_MANAGER, network),
+      address: manager,
       functionName: 'collect',
       args: [
         {
diff --git a/packages/core/src/positions/fetchLiquidityPositions/fetchPositionsSet.ts b/packages/core/src/positions/fetchLiquidityPositions/fetchPositionsSet.ts
index 593a60f..369b5bc 100644
--- a/packages/core/src/positions/fetchLiquidityPositions/fetchPositionsSet.ts
+++ b/packages/core/src/positions/fetchLiquidityPositions/fetchPositionsSet.ts
@@ -10,6 +10,7 @@ import { addressEqual } from '@nftx/utils';
 import transformPosition from './transformPosition';
 import { NotFoundError } from '@nftx/errors';
 import fetchClaimableAmount from './fetchClaimableAmount';
+import getManager from './getManager';
 
 const getVaultByTokens = <V extends Pick<Vault, 'id'>>({
   inputTokens,
@@ -64,9 +65,9 @@ const fetchPositionsSet = async ({
         vaults,
       });
       const [claimable0, claimable1] = await fetchClaimableAmount({
-        network,
         tokenId: position.tokenId as TokenId,
         provider,
+        manager: getManager(network, position.timestampOpened),
       });
       return transformPosition({
         network,
diff --git a/packages/core/src/positions/fetchLiquidityPositions/getManager.ts b/packages/core/src/positions/fetchLiquidityPositions/getManager.ts
new file mode 100644
index 0000000..9d55749
--- /dev/null
+++ b/packages/core/src/positions/fetchLiquidityPositions/getManager.ts
@@ -0,0 +1,14 @@
+import { NONFUNGIBLE_POSITION_MANAGER, Network } from '@nftx/constants';
+import { getChainConstant } from '@nftx/utils';
+
+const getManager = (network: number, timestampOpened: string) => {
+  const lastTimeOldContractUsed = 1704206700;
+  const timestamp = Number(timestampOpened);
+  // If older than this, it's the old contract
+  if (timestamp <= lastTimeOldContractUsed && network === Network.Sepolia) {
+    return '0x55bdc76262b1e6e791d0636a0bc61cee23cdfa87';
+  }
+  return getChainConstant(NONFUNGIBLE_POSITION_MANAGER, network);
+};
+
+export default getManager;
diff --git a/packages/core/src/positions/fetchLiquidityPositions/queryPositionData.ts b/packages/core/src/positions/fetchLiquidityPositions/queryPositionData.ts
index 3fd2138..121114b 100644
--- a/packages/core/src/positions/fetchLiquidityPositions/queryPositionData.ts
+++ b/packages/core/src/positions/fetchLiquidityPositions/queryPositionData.ts
@@ -32,6 +32,7 @@ const queryPositionData = ({
       s.cumulativeDepositTokenAmounts,
       s.cumulativeWithdrawTokenAmounts,
       s.lockedUntil,
+      s.timestampOpened,
       s.tickUpper((tick) => [tick.index]),
       s.tickLower((tick) => [tick.index]),
       s.pool((pool) => [
diff --git a/packages/core/src/positions/fetchLiquidityPositions/transformPosition.ts b/packages/core/src/positions/fetchLiquidityPositions/transformPosition.ts
index ff3055d..626b354 100644
--- a/packages/core/src/positions/fetchLiquidityPositions/transformPosition.ts
+++ b/packages/core/src/positions/fetchLiquidityPositions/transformPosition.ts
@@ -3,6 +3,7 @@ import type { PositionsResponse } from './types';
 import { WETH_TOKEN, WeiPerEther, Zero } from '@nftx/constants';
 import calculateVTokenEth from './calculateVTokenEth';
 import { addressEqual, getChainConstant } from '@nftx/utils';
+import getManager from './getManager';
 
 type Position = PositionsResponse['positions'][0];
 
@@ -66,6 +67,8 @@ const transformPosition = ({
   // TODO: get this from... somwhere?
   const lifetimeRewards = Zero;
 
+  const manager = getManager(network, position.timestampOpened);
+
   return {
     id: position.id as Address,
     poolId: position.pool.id as Address,
@@ -90,6 +93,7 @@ const transformPosition = ({
     poolShare: Zero,
     initialValue: value,
     lockedUntil,
+    manager,
   };
 };
 
diff --git a/packages/types/src/positions.ts b/packages/types/src/positions.ts
index 6a71c85..32b510d 100644
--- a/packages/types/src/positions.ts
+++ b/packages/types/src/positions.ts
@@ -41,6 +41,8 @@ export type LiquidityPosition = {
   /** The amount claimable on this position in ETH */
   claimableValue: bigint;
   lockedUntil: number;
+  /** The address of the manager contract for this position */
+  manager: Address;
 };
 
 /** A user's Inventory Position, essentially a single xNFT */