diff --git a/packages/stargate/src/modules/staking/aminomessages.spec.ts b/packages/stargate/src/modules/staking/aminomessages.spec.ts
index ca8699d8..3a229146 100644
--- a/packages/stargate/src/modules/staking/aminomessages.spec.ts
+++ b/packages/stargate/src/modules/staking/aminomessages.spec.ts
@@ -56,9 +56,9 @@ describe("AminoTypes", () => {
           details: "...",
         },
         commission: {
-          rate: "0.2",
-          maxRate: "0.3",
-          maxChangeRate: "0.1",
+          rate: "200000000000000000", // 0.2
+          maxRate: "300000000000000000", // 0.3
+          maxChangeRate: "100000000000000000", // 0.1
         },
         minSelfDelegation: "123",
         delegatorAddress: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
@@ -85,9 +85,9 @@ describe("AminoTypes", () => {
             details: "...",
           },
           commission: {
-            rate: "0.2",
-            max_rate: "0.3",
-            max_change_rate: "0.1",
+            rate: "0.200000000000000000",
+            max_rate: "0.300000000000000000",
+            max_change_rate: "0.100000000000000000",
           },
           min_self_delegation: "123",
           delegator_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
@@ -133,7 +133,7 @@ describe("AminoTypes", () => {
           securityContact: "Hamburglar",
           details: "...",
         },
-        commissionRate: "0.2",
+        commissionRate: "21000000000000000", // 0.021
         minSelfDelegation: "123",
         validatorAddress: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
       };
@@ -152,7 +152,7 @@ describe("AminoTypes", () => {
             security_contact: "Hamburglar",
             details: "...",
           },
-          commission_rate: "0.2",
+          commission_rate: "0.021000000000000000",
           min_self_delegation: "123",
           validator_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
         },
@@ -219,9 +219,9 @@ describe("AminoTypes", () => {
             details: "...",
           },
           commission: {
-            rate: "0.2",
-            max_rate: "0.3",
-            max_change_rate: "0.1",
+            rate: "0.200000000000000000",
+            max_rate: "0.300000000000000000",
+            max_change_rate: "0.100000000000000000",
           },
           min_self_delegation: "123",
           delegator_address: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
@@ -243,9 +243,9 @@ describe("AminoTypes", () => {
           details: "...",
         },
         commission: {
-          rate: "0.2",
-          maxRate: "0.3",
-          maxChangeRate: "0.1",
+          rate: "200000000000000000", // 0.2
+          maxRate: "300000000000000000", // 0.3
+          maxChangeRate: "100000000000000000", // 0.1
         },
         minSelfDelegation: "123",
         delegatorAddress: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",
@@ -294,7 +294,7 @@ describe("AminoTypes", () => {
             security_contact: "Hamburglar",
             details: "...",
           },
-          commission_rate: "0.2",
+          commission_rate: "0.050000000000000000", // 0.05
           min_self_delegation: "123",
           validator_address: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
         },
@@ -308,7 +308,7 @@ describe("AminoTypes", () => {
           securityContact: "Hamburglar",
           details: "...",
         },
-        commissionRate: "0.2",
+        commissionRate: "50000000000000000", // 0.05
         minSelfDelegation: "123",
         validatorAddress: "cosmos10dyr9899g6t0pelew4nvf4j5c3jcgv0r73qga5",
       };
diff --git a/packages/stargate/src/modules/staking/aminomessages.ts b/packages/stargate/src/modules/staking/aminomessages.ts
index 97904b02..9a4723e9 100644
--- a/packages/stargate/src/modules/staking/aminomessages.ts
+++ b/packages/stargate/src/modules/staking/aminomessages.ts
@@ -1,6 +1,7 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { AminoMsg, Coin, decodeBech32Pubkey, encodeBech32Pubkey } from "@cosmjs/amino";
 import { fromBase64, toBase64 } from "@cosmjs/encoding";
+import { Decimal } from "@cosmjs/math";
 import { assertDefinedAndNotNull } from "@cosmjs/utils";
 import {
   MsgBeginRedelegate,
@@ -28,6 +29,17 @@ interface Description {
   readonly details: string;
 }
 
+function protoDecimalToJson(decimal: string): string {
+  const parsed = Decimal.fromAtomics(decimal, 18);
+  const [whole, fractional] = parsed.toString().split(".");
+  return `${whole}.${fractional.padEnd(18, "0")}`;
+}
+
+function jsonDecimalToProto(decimal: string): string {
+  const parsed = Decimal.fromUserInput(decimal, 18);
+  return parsed.atomics;
+}
+
 /** Creates a new validator. */
 export interface AminoMsgCreateValidator extends AminoMsg {
   readonly type: "cosmos-sdk/MsgCreateValidator";
@@ -175,9 +187,9 @@ export function createStakingAminoConverters(
             details: description.details,
           },
           commission: {
-            rate: commission.rate,
-            max_rate: commission.maxRate,
-            max_change_rate: commission.maxChangeRate,
+            rate: protoDecimalToJson(commission.rate),
+            max_rate: protoDecimalToJson(commission.maxRate),
+            max_change_rate: protoDecimalToJson(commission.maxChangeRate),
           },
           min_self_delegation: minSelfDelegation,
           delegator_address: delegatorAddress,
@@ -214,9 +226,9 @@ export function createStakingAminoConverters(
             details: description.details,
           },
           commission: {
-            rate: commission.rate,
-            maxRate: commission.max_rate,
-            maxChangeRate: commission.max_change_rate,
+            rate: jsonDecimalToProto(commission.rate),
+            maxRate: jsonDecimalToProto(commission.max_rate),
+            maxChangeRate: jsonDecimalToProto(commission.max_change_rate),
           },
           minSelfDelegation: min_self_delegation,
           delegatorAddress: delegator_address,
@@ -266,7 +278,7 @@ export function createStakingAminoConverters(
             security_contact: description.securityContact,
             details: description.details,
           },
-          commission_rate: commissionRate,
+          commission_rate: protoDecimalToJson(commissionRate),
           min_self_delegation: minSelfDelegation,
           validator_address: validatorAddress,
         };
@@ -284,7 +296,7 @@ export function createStakingAminoConverters(
           securityContact: description.security_contact,
           details: description.details,
         },
-        commissionRate: commission_rate,
+        commissionRate: jsonDecimalToProto(commission_rate),
         minSelfDelegation: min_self_delegation,
         validatorAddress: validator_address,
       }),