diff --git a/CHANGELOG.md b/CHANGELOG.md
index ccfdfb8f88..67c28c49aa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to
 
 ## [Unreleased]
 
+### Changed
+- @cosmjs/stargate: change `packetCommitment` parameter `sequence` type from `Long` to `number`
+
 ## [0.28.6] - 2022-06-08
 
 ## [0.28.5] - 2022-06-08
diff --git a/packages/stargate/src/modules/ibc/queries.spec.ts b/packages/stargate/src/modules/ibc/queries.spec.ts
index 19ed3587f7..7455fe1946 100644
--- a/packages/stargate/src/modules/ibc/queries.spec.ts
+++ b/packages/stargate/src/modules/ibc/queries.spec.ts
@@ -127,7 +127,7 @@ describe("IbcExtension", () => {
         const response = await client.ibc.channel.packetCommitment(
           ibcTest.portId,
           ibcTest.channelId,
-          Long.fromInt(ibcTest.commitment.sequence, true),
+          ibcTest.commitment.sequence,
         );
         expect(response.commitment).toEqual(ibcTest.commitment.data);
         expect(response.proofHeight).toBeDefined();
diff --git a/packages/stargate/src/modules/ibc/queries.ts b/packages/stargate/src/modules/ibc/queries.ts
index 26b0d22832..1b72d5ee2a 100644
--- a/packages/stargate/src/modules/ibc/queries.ts
+++ b/packages/stargate/src/modules/ibc/queries.ts
@@ -87,7 +87,7 @@ export interface IbcExtension {
       readonly packetCommitment: (
         portId: string,
         channelId: string,
-        sequence: Long,
+        sequence: number,
       ) => Promise<QueryPacketCommitmentResponse>;
       readonly packetCommitments: (
         portId: string,
@@ -261,11 +261,11 @@ export function setupIbcExtension(base: QueryClient): IbcExtension {
             revisionNumber: Long.fromNumber(revisionNumber, true),
             revisionHeight: Long.fromNumber(revisionHeight, true),
           }),
-        packetCommitment: async (portId: string, channelId: string, sequence: Long) =>
+        packetCommitment: async (portId: string, channelId: string, sequence: number) =>
           channelQueryService.PacketCommitment({
             portId: portId,
             channelId: channelId,
-            sequence: sequence,
+            sequence: Long.fromNumber(sequence, true),
           }),
         packetCommitments: async (portId: string, channelId: string, paginationKey?: Uint8Array) =>
           channelQueryService.PacketCommitments({