diff --git a/packages/stargate/src/modules/staking/aminomessages.spec.ts b/packages/stargate/src/modules/staking/aminomessages.spec.ts
index d18394060f..480ad50570 100644
--- a/packages/stargate/src/modules/staking/aminomessages.spec.ts
+++ b/packages/stargate/src/modules/staking/aminomessages.spec.ts
@@ -220,7 +220,7 @@ describe("AminoTypes", () => {
           delegator_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
           validator_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
           amount: coin(1234, "ucosm"),
-          creation_height: BigInt("1"),
+          creation_height: "1",
         },
       };
       expect(aminoMsg).toEqual(expected);
@@ -396,7 +396,7 @@ describe("AminoTypes", () => {
           delegator_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
           validator_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
           amount: coin(1234, "ucosm"),
-          creation_height: BigInt("1"),
+          creation_height: "1",
         },
       };
       const msg = new AminoTypes(createStakingAminoConverters()).fromAmino(aminoMsg);
diff --git a/packages/stargate/src/modules/staking/aminomessages.ts b/packages/stargate/src/modules/staking/aminomessages.ts
index 0d95bf5a8b..86bf4650ac 100644
--- a/packages/stargate/src/modules/staking/aminomessages.ts
+++ b/packages/stargate/src/modules/staking/aminomessages.ts
@@ -150,7 +150,7 @@ export interface AminoMsgCancelUnbondingDelegation extends AminoMsg {
     readonly delegator_address: string;
     readonly validator_address: string;
     readonly amount: Coin;
-    readonly creation_height: bigint;
+    readonly creation_height: string;
   };
 }