diff --git a/src/components/admin/VerifierRegistry.tsx b/src/components/admin/VerifierRegistry.tsx
index b70f1304..b2522d11 100644
--- a/src/components/admin/VerifierRegistry.tsx
+++ b/src/components/admin/VerifierRegistry.tsx
@@ -47,7 +47,7 @@ type VerifierRegistryForm = {
 };
 
 function updateVerifier(params: {
-  queryId?: number;
+  queryId?: bigint;
   id: bigint;
   quorum: number;
   endpoints: Map<bigint, number>;
@@ -56,7 +56,7 @@ function updateVerifier(params: {
 }) {
   let msgBody = beginCell();
   msgBody.storeUint(OperationCodes.updateVerifier, 32);
-  msgBody.storeUint(params.queryId || 0, 64);
+  msgBody.storeUint(params.queryId || 0n, 64);
   msgBody.storeUint(params.id, 256);
   msgBody.storeUint(params.quorum, 8);
 
@@ -72,10 +72,10 @@ function updateVerifier(params: {
   return msgBody.endCell();
 }
 
-function removeVerifier(params: { queryId?: number; id: bigint }) {
+function removeVerifier(params: { queryId?: bigint; id: bigint }) {
   let msgBody = beginCell();
   msgBody.storeUint(OperationCodes.removeVerifier, 32);
-  msgBody.storeUint(params.queryId || 0, 64);
+  msgBody.storeUint(params.queryId || 0n, 64);
   msgBody.storeUint(params.id, 256);
   return msgBody.endCell();
 }
diff --git a/src/lib/useSubmitSources.ts b/src/lib/useSubmitSources.ts
index 64ebd1e8..218f3b37 100644
--- a/src/lib/useSubmitSources.ts
+++ b/src/lib/useSubmitSources.ts
@@ -199,7 +199,7 @@ export function useSubmitSources() {
       );
 
       const s = Cell.fromBoc(Buffer.from(result.msgCell))[0].beginParse();
-      queryId = s.loadUint(64);
+      queryId = s.loadUintBig(64);
     }
 
     return {