diff --git a/packages/page-parachains/src/Auctions/Auction.tsx b/packages/page-parachains/src/Auctions/Auction.tsx
index 91f13cb476..8198aa14d2 100644
--- a/packages/page-parachains/src/Auctions/Auction.tsx
+++ b/packages/page-parachains/src/Auctions/Auction.tsx
@@ -34,8 +34,8 @@ function Auction ({ auctionInfo, campaigns, className, winningData }: Props): Re
         ? winners
         : winners.map((w): WinnerData =>
           campaigns.funds?.find(({ firstSlot, lastSlot, value }) =>
-            w.firstSlot === firstSlot &&
-            w.lastSlot === lastSlot &&
+            w.firstSlot.eq(firstSlot) &&
+            w.lastSlot.eq(lastSlot) &&
             w.value.lt(value)
           ) || w
         ),
diff --git a/packages/page-parachains/src/Auctions/Bid.tsx b/packages/page-parachains/src/Auctions/Bid.tsx
index babc8aab95..56d037eee6 100644
--- a/packages/page-parachains/src/Auctions/Bid.tsx
+++ b/packages/page-parachains/src/Auctions/Bid.tsx
@@ -61,8 +61,8 @@ function Bid ({ auctionInfo, className, lastWinners, ownedIds }: Props): React.R
 
   const currentWinner = useMemo(
     () => lastWinners && lastWinners.winners.find(({ firstSlot, lastSlot }) =>
-      rangeOpts[range].firstSlot === firstSlot &&
-      rangeOpts[range].lastSlot === lastSlot
+      firstSlot.eqn(rangeOpts[range].firstSlot) &&
+      lastSlot.eqn(rangeOpts[range].lastSlot)
     ),
     [lastWinners, range, rangeOpts]
   );
diff --git a/packages/page-parachains/src/types.ts b/packages/page-parachains/src/types.ts
index 7879269359..f752d844bc 100644
--- a/packages/page-parachains/src/types.ts
+++ b/packages/page-parachains/src/types.ts
@@ -65,9 +65,9 @@ export interface OwnerInfo {
 
 export interface WinnerData {
   accountId: string;
-  firstSlot: number;
+  firstSlot: BN;
   isCrowdloan: boolean;
-  lastSlot: number;
+  lastSlot: BN;
   paraId: ParaId;
   value: BN;
 }
diff --git a/packages/page-parachains/src/useFunds.ts b/packages/page-parachains/src/useFunds.ts
index 83bfff513a..ba59b8aeb9 100644
--- a/packages/page-parachains/src/useFunds.ts
+++ b/packages/page-parachains/src/useFunds.ts
@@ -30,7 +30,7 @@ function createAddress (paraId: ParaId): Uint8Array {
 }
 
 function isCrowdloadAccount (paraId: ParaId, accountId: AccountId): boolean {
-  return accountId.eq();
+  return accountId.eq(createAddress(paraId));
 }
 
 function hasLease (paraId: ParaId, leased: ParaId[]): boolean {
@@ -123,10 +123,10 @@ const optFundMulti = {
       .filter((v): v is [ParaId, FundInfo] => !!v[1])
       .map(([paraId, info]): Campaign => ({
         accountId: encodeAddress(createAddress(paraId)),
-        firstSlot: info.firstSlot.toNumber(),
+        firstSlot: info.firstSlot,
         info,
         isCrowdloan: true,
-        lastSlot: info.lastSlot.toNumber(),
+        lastSlot: info.lastSlot,
         paraId,
         value: info.raised
       }))
diff --git a/packages/page-parachains/src/useWinningData.ts b/packages/page-parachains/src/useWinningData.ts
index fe58445ead..f36c0b65dd 100644
--- a/packages/page-parachains/src/useWinningData.ts
+++ b/packages/page-parachains/src/useWinningData.ts
@@ -22,8 +22,8 @@ function isNewWinners (a: WinnerData[], b: WinnerData[]): boolean {
 function isNewOrdering (a: WinnerData[], b: WinnerData[]): boolean {
   return a.length !== b.length || a.some(({ firstSlot, lastSlot, paraId }, index) =>
     !paraId.eq(b[index].paraId) ||
-    firstSlot !== b[index].firstSlot ||
-    lastSlot !== b[index].lastSlot
+    !firstSlot.eq(b[index].firstSlot) ||
+    !lastSlot.eq(b[index].lastSlot)
   );
 }
 
@@ -33,14 +33,14 @@ function extractWinners (auctionInfo: AuctionInfo, optData: Option<WinningData>)
     : optData.unwrap().reduce<WinnerData[]>((winners, optEntry, index): WinnerData[] => {
       if (optEntry.isSome) {
         const [accountId, paraId, value] = optEntry.unwrap();
-        const period = auctionInfo.leasePeriod?.toNumber() || 0;
+        const period = auctionInfo.leasePeriod || BN_ZERO;
         const [first, last] = RANGES[index];
 
         winners.push({
           accountId: accountId.toString(),
-          firstSlot: first + period,
+          firstSlot: period.addn(first),
           isCrowdloan: u8aEq(CROWD_PREFIX, accountId.subarray(0, CROWD_PREFIX.length)),
-          lastSlot: last + period,
+          lastSlot: period.addn(last),
           paraId,
           value
         });