diff --git a/app/src/main/java/ru/vtosters/lite/hooks/AppVerHook.java b/app/src/main/java/ru/vtosters/lite/hooks/AppVerHook.java
index 7cc11e391..7ed0375c1 100644
--- a/app/src/main/java/ru/vtosters/lite/hooks/AppVerHook.java
+++ b/app/src/main/java/ru/vtosters/lite/hooks/AppVerHook.java
@@ -1,13 +1,15 @@
 package ru.vtosters.lite.hooks;
 
+import static ru.vtosters.lite.utils.Preferences.getBoolValue;
+
 import b.h.g.g.BuildInfo;
 
 public class AppVerHook {
-    public static String appBuild() {
-        return String.valueOf(BuildInfo.i.e());
+    public static int appBuild() {
+        return getBoolValue("useOldAppVer", false) ? 6561 : BuildInfo.i.e();
     }
 
     public static String appVer() {
-        return BuildInfo.i.d(); // 7.26
+        return getBoolValue("useOldAppVer", false) ? "6.18.1" : BuildInfo.i.d();
     }
 }
diff --git a/app/src/main/java/ru/vtosters/lite/ui/fragments/VTSettings.java b/app/src/main/java/ru/vtosters/lite/ui/fragments/VTSettings.java
index 2803fbfda..153b808c2 100644
--- a/app/src/main/java/ru/vtosters/lite/ui/fragments/VTSettings.java
+++ b/app/src/main/java/ru/vtosters/lite/ui/fragments/VTSettings.java
@@ -251,7 +251,7 @@ public class VTSettings extends MaterialPreferenceToolbarFragment {
                 return true;
             });
 
-            if (dev()) {
+            if (dev() && isValidSignature()) {
                 addMaterialSwitchPreference(this, "autoupdates", requireContext().getString(R.string.checkupdates), "", R.drawable.ic_camera_switch_outline_24, true, (preference, o) -> {
                     boolean value = (boolean) o;
                     edit().putBoolean("autoupdates", value).commit();
diff --git a/smali/res/xml/preferences_debug.xml b/smali/res/xml/preferences_debug.xml
index 00930639d..ca8f88560 100644
--- a/smali/res/xml/preferences_debug.xml
+++ b/smali/res/xml/preferences_debug.xml
@@ -22,6 +22,10 @@
             android:key="calls"
             android:summary="@string/messages_interface_calls_summary"
             android:title="@string/vtlcalls" />
+        <com.vtosters.lite.ui.MaterialSwitchPreference
+            android:defaultValue="false"
+            android:key="useOldAppVer"
+            android:title="useOldAppVer" />
         <com.vtosters.lite.ui.MaterialSwitchPreference
             android:defaultValue="false"
             android:key="podcastcatalog"
diff --git a/smali/smali_classes2/com/vk/core/network/utils/NetworkUserAgent.smali b/smali/smali_classes2/com/vk/core/network/utils/NetworkUserAgent.smali
index 1b243f78d..911279201 100644
--- a/smali/smali_classes2/com/vk/core/network/utils/NetworkUserAgent.smali
+++ b/smali/smali_classes2/com/vk/core/network/utils/NetworkUserAgent.smali
@@ -119,13 +119,13 @@
 
     if-nez v0, :cond_0
 
-    invoke-static {}, Lru/vtosters/lite/hooks/AppVerHook;->appBuild()Ljava/lang/String;
+    invoke-static {}, Lru/vtosters/lite/hooks/AppVerHook;->appVer()Ljava/lang/String;
 
     move-result-object v0
 
-    invoke-static {}, Lru/vtosters/lite/hooks/AppVerHook;->appVer()Ljava/lang/String;
+    invoke-static {}, Lru/vtosters/lite/hooks/AppVerHook;->appBuild()I
 
-    move-result-object v1
+    move-result v1
 
     .line 4
     sget-object v2, Lcom/vk/core/util/AppContextHolder;->a:Landroid/content/Context;
@@ -147,6 +147,10 @@
 
     const/4 v0, 0x1
 
+    invoke-static {v1}, Ljava/lang/Integer;->valueOf(I)Ljava/lang/Integer;
+
+    move-result-object v1
+
     aput-object v1, v4, v0
 
     const/4 v0, 0x2