diff --git a/clients/validator/src/index.ts b/clients/validator/src/index.ts
index 33f44c6aab..76b475b8d3 100644
--- a/clients/validator/src/index.ts
+++ b/clients/validator/src/index.ts
@@ -433,6 +433,14 @@ export default class ValidatorClient implements INymClient {
     return (this.client as ISigningClient).undelegateFromMixNode(this.mixnetContract, mixIdentity, fee, memo);
   }
 
+  public async updateMixnodeConfig(
+    mixIdentity: string,
+    fee: StdFee | 'auto' | number,
+    profitPercentage: number,
+  ): Promise<ExecuteResult> {
+    return (this.client as ISigningClient).updateMixnodeConfig(this.mixnetContract, mixIdentity, profitPercentage, fee);
+  }
+
   public async updateContractStateParams(
     newParams: ContractStateParams,
     fee?: StdFee | 'auto' | number,
@@ -441,4 +449,4 @@ export default class ValidatorClient implements INymClient {
     this.assertSigning();
     return (this.client as ISigningClient).updateContractStateParams(this.mixnetContract, newParams, fee, memo);
   }
-}
+}
\ No newline at end of file
diff --git a/clients/validator/src/signing-client.ts b/clients/validator/src/signing-client.ts
index eb79efd51a..8b027e9480 100644
--- a/clients/validator/src/signing-client.ts
+++ b/clients/validator/src/signing-client.ts
@@ -178,6 +178,13 @@ export interface ISigningClient extends IQueryClient, ICosmWasmSigning, INymSign
     memo?: string,
   ): Promise<ExecuteResult>;
 
+  updateMixnodeConfig(
+    mixnetContractAddress: string,
+    mixIdentity: string,
+    profitMarginPercent: number,
+    fee: StdFee | 'auto' | number,
+  ): Promise<ExecuteResult>;
+
   updateContractStateParams(
     mixnetContractAddress: string,
     newParams: ContractStateParams,
@@ -448,6 +455,20 @@ export default class SigningClient extends SigningCosmWasmClient implements ISig
     );
   }
 
+  updateMixnodeConfig(
+    mixnetContractAddress: string,
+    mixIdentity: string,
+    profitMarginPercent: number,
+    fee: StdFee | 'auto' | number,
+  ): Promise<ExecuteResult> {
+    return this.execute(
+      this.clientAddress,
+      mixnetContractAddress,
+      { update_mixnode_config: { profit_margin_percent: profitMarginPercent, mix_identity: mixIdentity } },
+      fee,
+    );
+  }
+
   updateContractStateParams(
     mixnetContractAddress: string,
     newParams: ContractStateParams,