diff --git a/package-lock.json b/package-lock.json
index 9823dc8..c1f943c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@sats-connect/core",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@sats-connect/core",
-      "version": "0.1.0",
+      "version": "0.1.1",
       "license": "ISC",
       "dependencies": {
         "axios": "1.6.8",
diff --git a/package.json b/package.json
index 9a22fbb..7b60173 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sats-connect/core",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "main": "dist/index.mjs",
   "module": "dist/index.mjs",
   "types": "dist/index.d.mts",
diff --git a/src/messages/types.ts b/src/messages/types.ts
index 5c4baf2..467fd95 100644
--- a/src/messages/types.ts
+++ b/src/messages/types.ts
@@ -1,8 +1,10 @@
+import { MessageSigningProtocols } from 'src/request';
 import type { RequestOptions, RequestPayload } from '../types';
 
 export interface SignMessagePayload extends RequestPayload {
   address: string;
   message: string;
+  protocol?: MessageSigningProtocols;
 }
 
 export type SignMessageResponse = string;
diff --git a/src/request/types/btcMethods.ts b/src/request/types/btcMethods.ts
index 70ba45e..daddcf0 100644
--- a/src/request/types/btcMethods.ts
+++ b/src/request/types/btcMethods.ts
@@ -76,6 +76,12 @@ export type GetAddresses = MethodParamsAndResult<
 >;
 
 export const signMessageMethodName = 'signMessage';
+
+export enum MessageSigningProtocols {
+  ECDSA = 'ECDSA',
+  BIP322 = 'BIP322',
+}
+
 export const signMessageParamsSchema = v.object({
   /**
    * The address used for signing.
@@ -85,6 +91,10 @@ export const signMessageParamsSchema = v.object({
    * The message to sign.
    **/
   message: v.string(),
+  /**
+   * The protocol to use for signing the message.
+   */
+  protocol: v.optional(v.enum(MessageSigningProtocols)),
 });
 export type SignMessageParams = v.InferOutput<typeof signMessageParamsSchema>;
 export const signMessageResultSchema = v.object({
@@ -100,6 +110,10 @@ export const signMessageResultSchema = v.object({
    * The address used for signing.
    */
   address: v.string(),
+  /**
+   * The protocol to use for signing the message.
+   */
+  protocol: v.enum(MessageSigningProtocols),
 });
 export type SignMessageResult = v.InferOutput<typeof signMessageResultSchema>;
 export const signMessageRequestMessageSchema = v.object({