diff --git a/package.json b/package.json
index a480006..f382719 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     },
     "safe_app": {
       "mirror": "https://s3.eu-west-2.amazonaws.com/safe-client-libs",
-      "version": "d5d9253",
+      "version": "57f3afb",
       "targetDir": "src/native",
       "filename": "safe_app",
       "filePattern": "^.*\\.(dll|so|dylib)$",
diff --git a/src/api/auth.js b/src/api/auth.js
index a14636c..b89e9f8 100644
--- a/src/api/auth.js
+++ b/src/api/auth.js
@@ -189,7 +189,7 @@ class AuthInterface {
   */
   /* eslint-disable class-methods-use-this */
   genConnUri() {
-    return lib.encode_unregistered_req()
+    return lib.encode_unregistered_req(this.app.appInfo.id)
       .then(addSafeAuthProtocol);
   }
 
diff --git a/src/native/_auth.js b/src/native/_auth.js
index f1a405f..2c30611 100644
--- a/src/native/_auth.js
+++ b/src/native/_auth.js
@@ -190,7 +190,7 @@ module.exports = {
     encode_auth_req: [t.Void, [ ref.refType(AuthReq), 'pointer', 'pointer'] ],
     encode_containers_req: [t.Void, [ref.refType(ContainerReq), 'pointer', 'pointer'] ],
     encode_share_mdata_req: [t.Void, [ref.refType(ShareMDataReq), 'pointer', 'pointer'] ],
-    encode_unregistered_req: [t.Void, ['pointer', 'pointer'] ],
+    encode_unregistered_req: [t.Void, [t.u8Pointer, t.usize, 'pointer', 'pointer'] ],
     decode_ipc_msg: [t.Void, [
                       'string', //  (msg: *const c_char,
                       t.VoidPtr, // user_data: *mut c_void,
@@ -234,7 +234,10 @@ module.exports = {
     encode_containers_req: helpers.Promisified(null, ['uint32', 'char *'], remapEncodeValues),
     encode_auth_req: helpers.Promisified(null, ['uint32', 'char *'], remapEncodeValues),
     encode_share_mdata_req: helpers.Promisified(null, ['uint32', 'char *'], remapEncodeValues),
-    encode_unregistered_req: helpers.Promisified(null, ['uint32', 'char *'], remapEncodeValues),
+    encode_unregistered_req: helpers.Promisified((appId) => {
+      let str = new Buffer(appId);
+      return [str, str.length];
+    }, ['uint32', 'char *'], remapEncodeValues),
     decode_ipc_msg: (lib, fn) => {
       return ((str) => {
         return new Promise((resolve, reject) => {