diff --git a/VERSION.properties b/VERSION.properties
index 8269fbcc..d66506bb 100644
--- a/VERSION.properties
+++ b/VERSION.properties
@@ -1,2 +1,2 @@
-client.version=1.12.7
+client.version=1.12.8
 server.version=1.10.3
diff --git a/shine-UI/js/services/auth-service.js b/shine-UI/js/services/auth-service.js
index 5348ea28..f1687c1f 100644
--- a/shine-UI/js/services/auth-service.js
+++ b/shine-UI/js/services/auth-service.js
@@ -3083,8 +3083,7 @@ export class AuthService {
     const privateKey = await importPkcs8Ed25519(clientPrivPkcs8);
     const clientKey = await publicKeyB64FromPkcs8Ed25519(clientPrivPkcs8);
 
-    const preimage = [
-      'SHiNe/ChannelReadState:',
+    const preimage = 'SHiNe/ChannelReadState:' + [
       escapeUserSettingPart(cleanLogin),
       escapeUserSettingPart(cleanOwnerBch),
       escapeUserSettingPart(cleanChannelName),
@@ -3132,8 +3131,7 @@ export class AuthService {
     const privateKey = await importPkcs8Ed25519(clientPrivPkcs8);
     const clientKey = await publicKeyB64FromPkcs8Ed25519(clientPrivPkcs8);
 
-    const preimage = [
-      'SHiNe/UserSettings:',
+    const preimage = 'SHiNe/UserSettings:' + [
       escapeUserSettingPart(cleanLogin),
       String(cleanSettingType),
       escapeUserSettingPart(cleanSettingKey),