diff --git a/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts b/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
index af09c695..02e1c252 100644
--- a/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
+++ b/packages/cosmwasm-stargate/src/signingcosmwasmclient.ts
@@ -541,7 +541,7 @@ export class SigningCosmWasmClient extends CosmWasmClient {
     delegatorAddress: string,
     validatorAddress: string,
     amount: Coin,
-    creationHeight: number,
+    creationHeight: bigint | undefined,
     fee: StdFee | "auto" | number,
     memo = "",
   ): Promise<DeliverTxResponse> {
diff --git a/packages/stargate/src/signingstargateclient.ts b/packages/stargate/src/signingstargateclient.ts
index 43f2ea85..b2c4b616 100644
--- a/packages/stargate/src/signingstargateclient.ts
+++ b/packages/stargate/src/signingstargateclient.ts
@@ -218,7 +218,7 @@ export class SigningStargateClient extends StargateClient {
     delegatorAddress: string,
     validatorAddress: string,
     amount: Coin,
-    creationHeight: number,
+    creationHeight: bigint | undefined,
     fee: StdFee | "auto" | number,
     memo = "",
   ): Promise<DeliverTxResponse> {