diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3cb8302cdc..8f538b1a1a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,9 +40,13 @@ and this project adheres to
 - all: Upgrade cosmjs-types to 0.5 ([#1131]).
 - @cosmjs/stargate: Change `packetCommitment` parameter `sequence` type from
   `Long` to `number` ([#1168]).
+- @cosmjs/tendermint-rpc: The type of `votingPower` fields was changed from
+  `number` to `bigint` as those values can exceed the safe integer range
+  ([#1133]).
 
 [#1131]: https://github.com/cosmos/cosmjs/pull/1131
 [#1168]: https://github.com/cosmos/cosmjs/pull/1168
+[#1133]: https://github.com/cosmos/cosmjs/issues/1133
 
 ## [0.28.9] - 2022-06-21
 
diff --git a/packages/tendermint-rpc/src/tendermint34/adaptor/responses.spec.ts b/packages/tendermint-rpc/src/tendermint34/adaptor/responses.spec.ts
index 0ad26490ab..7de09654d0 100644
--- a/packages/tendermint-rpc/src/tendermint34/adaptor/responses.spec.ts
+++ b/packages/tendermint-rpc/src/tendermint34/adaptor/responses.spec.ts
@@ -44,7 +44,7 @@ describe("Adaptor Responses", () => {
       });
       expect(validator).toEqual({
         address: fromHex("A03DC128D38DB0BC5F18AE1872F1CB2E1FD41157"),
-        votingPower: 169980,
+        votingPower: BigInt(169980),
         pubkey: {
           algorithm: "ed25519",
           data: fromBase64("2BX6Zuj8RmdJAkD1BAg6KB0v04liyM7jBdwOGIb9F9Q="),
@@ -72,7 +72,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("0kNlxBMpm+5WtfHIG1xsWatOXTKPLtmSqn3EiEIDZeI="),
         },
-        votingPower: 11418237,
+        votingPower: BigInt(11418237),
       });
     });
 
@@ -93,7 +93,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("HjSC7VkhKih6xMhudlqfaFE8ZZnP8RKJPv4iqR7RhcE="),
         },
-        votingPower: 0,
+        votingPower: BigInt(0),
       });
     });
   });
@@ -116,7 +116,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("0kNlxBMpm+5WtfHIG1xsWatOXTKPLtmSqn3EiEIDZeI="),
         },
-        votingPower: 11228980,
+        votingPower: BigInt(11228980),
         proposerPriority: 62870960,
       });
     });
diff --git a/packages/tendermint-rpc/src/tendermint34/adaptor/responses.ts b/packages/tendermint-rpc/src/tendermint34/adaptor/responses.ts
index 3457bdd235..e522294442 100644
--- a/packages/tendermint-rpc/src/tendermint34/adaptor/responses.ts
+++ b/packages/tendermint-rpc/src/tendermint34/adaptor/responses.ts
@@ -4,7 +4,7 @@ import { JsonRpcSuccessResponse } from "@cosmjs/json-rpc";
 import { assert } from "@cosmjs/utils";
 
 import { DateWithNanoseconds, fromRfc3339WithNanoseconds } from "../../dates";
-import { apiToSmallInt } from "../../inthelpers";
+import { apiToBigInt, apiToSmallInt } from "../../inthelpers";
 import { SubscriptionEvent } from "../../rpcclients";
 import { BlockIdFlag, CommitSignature, ValidatorPubkey } from "../../types";
 import {
@@ -279,7 +279,7 @@ interface RpcValidatorUpdate {
 export function decodeValidatorUpdate(data: RpcValidatorUpdate): responses.ValidatorUpdate {
   return {
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(data.power ?? 0),
+    votingPower: apiToBigInt(data.power ?? "0"),
   };
 }
 
@@ -528,7 +528,7 @@ export function decodeValidatorGenesis(data: RpcValidatorGenesis): responses.Val
   return {
     address: fromHex(assertNotEmpty(data.address)),
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(assertNotEmpty(data.power)),
+    votingPower: apiToBigInt(assertNotEmpty(data.power)),
   };
 }
 
@@ -571,7 +571,7 @@ interface RpcValidatorInfo {
 export function decodeValidatorInfo(data: RpcValidatorInfo): responses.Validator {
   return {
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(assertNotEmpty(data.voting_power)),
+    votingPower: apiToBigInt(assertNotEmpty(data.voting_power)),
     address: fromHex(assertNotEmpty(data.address)),
     proposerPriority: data.proposer_priority ? apiToSmallInt(data.proposer_priority) : undefined,
   };
diff --git a/packages/tendermint-rpc/src/tendermint34/responses.ts b/packages/tendermint-rpc/src/tendermint34/responses.ts
index 0e82dcb3db..70a3516fb3 100644
--- a/packages/tendermint-rpc/src/tendermint34/responses.ts
+++ b/packages/tendermint-rpc/src/tendermint34/responses.ts
@@ -352,13 +352,13 @@ export interface SyncInfo {
 export interface Validator {
   readonly address: Uint8Array;
   readonly pubkey?: ValidatorPubkey;
-  readonly votingPower: number;
+  readonly votingPower: bigint;
   readonly proposerPriority?: number;
 }
 
 export interface ValidatorUpdate {
   readonly pubkey: ValidatorPubkey;
-  readonly votingPower: number;
+  readonly votingPower: bigint;
 }
 
 export interface ConsensusParams {
diff --git a/packages/tendermint-rpc/src/tendermint35/adaptor/responses.spec.ts b/packages/tendermint-rpc/src/tendermint35/adaptor/responses.spec.ts
index 35e86679ea..c85b753328 100644
--- a/packages/tendermint-rpc/src/tendermint35/adaptor/responses.spec.ts
+++ b/packages/tendermint-rpc/src/tendermint35/adaptor/responses.spec.ts
@@ -44,7 +44,7 @@ describe("Adaptor Responses", () => {
       });
       expect(validator).toEqual({
         address: fromHex("A03DC128D38DB0BC5F18AE1872F1CB2E1FD41157"),
-        votingPower: 169980,
+        votingPower: BigInt(169980),
         pubkey: {
           algorithm: "ed25519",
           data: fromBase64("2BX6Zuj8RmdJAkD1BAg6KB0v04liyM7jBdwOGIb9F9Q="),
@@ -72,7 +72,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("0kNlxBMpm+5WtfHIG1xsWatOXTKPLtmSqn3EiEIDZeI="),
         },
-        votingPower: 11418237,
+        votingPower: BigInt(11418237),
       });
     });
 
@@ -93,7 +93,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("HjSC7VkhKih6xMhudlqfaFE8ZZnP8RKJPv4iqR7RhcE="),
         },
-        votingPower: 0,
+        votingPower: BigInt(0),
       });
     });
   });
@@ -116,7 +116,7 @@ describe("Adaptor Responses", () => {
           algorithm: "ed25519",
           data: fromBase64("0kNlxBMpm+5WtfHIG1xsWatOXTKPLtmSqn3EiEIDZeI="),
         },
-        votingPower: 11228980,
+        votingPower: BigInt(11228980),
         proposerPriority: 62870960,
       });
     });
diff --git a/packages/tendermint-rpc/src/tendermint35/adaptor/responses.ts b/packages/tendermint-rpc/src/tendermint35/adaptor/responses.ts
index b6a76fc45a..30aad6efba 100644
--- a/packages/tendermint-rpc/src/tendermint35/adaptor/responses.ts
+++ b/packages/tendermint-rpc/src/tendermint35/adaptor/responses.ts
@@ -4,7 +4,7 @@ import { JsonRpcSuccessResponse } from "@cosmjs/json-rpc";
 import { assert } from "@cosmjs/utils";
 
 import { DateWithNanoseconds, fromRfc3339WithNanoseconds } from "../../dates";
-import { apiToSmallInt } from "../../inthelpers";
+import { apiToBigInt, apiToSmallInt } from "../../inthelpers";
 import { SubscriptionEvent } from "../../rpcclients";
 import { BlockIdFlag, CommitSignature, ValidatorPubkey } from "../../types";
 import {
@@ -280,7 +280,7 @@ interface RpcValidatorUpdate {
 export function decodeValidatorUpdate(data: RpcValidatorUpdate): responses.ValidatorUpdate {
   return {
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(data.power ?? 0),
+    votingPower: apiToBigInt(data.power ?? "0"),
   };
 }
 
@@ -529,7 +529,7 @@ export function decodeValidatorGenesis(data: RpcValidatorGenesis): responses.Val
   return {
     address: fromHex(assertNotEmpty(data.address)),
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(assertNotEmpty(data.power)),
+    votingPower: apiToBigInt(assertNotEmpty(data.power)),
   };
 }
 
@@ -572,7 +572,7 @@ interface RpcValidatorInfo {
 export function decodeValidatorInfo(data: RpcValidatorInfo): responses.Validator {
   return {
     pubkey: decodePubkey(assertObject(data.pub_key)),
-    votingPower: apiToSmallInt(assertNotEmpty(data.voting_power)),
+    votingPower: apiToBigInt(assertNotEmpty(data.voting_power)),
     address: fromHex(assertNotEmpty(data.address)),
     proposerPriority: data.proposer_priority ? apiToSmallInt(data.proposer_priority) : undefined,
   };
diff --git a/packages/tendermint-rpc/src/tendermint35/responses.ts b/packages/tendermint-rpc/src/tendermint35/responses.ts
index f03cabcac8..7440d8d927 100644
--- a/packages/tendermint-rpc/src/tendermint35/responses.ts
+++ b/packages/tendermint-rpc/src/tendermint35/responses.ts
@@ -357,13 +357,13 @@ export interface SyncInfo {
 export interface Validator {
   readonly address: Uint8Array;
   readonly pubkey?: ValidatorPubkey;
-  readonly votingPower: number;
+  readonly votingPower: bigint;
   readonly proposerPriority?: number;
 }
 
 export interface ValidatorUpdate {
   readonly pubkey: ValidatorPubkey;
-  readonly votingPower: number;
+  readonly votingPower: bigint;
 }
 
 export interface ConsensusParams {