diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 4f39e3ba..01d834a0 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -1,4 +1,6 @@
--keep class org.lsposed.manager.Constants { *; }
+-keep class org.lsposed.manager.Constants {
+    public static void showErrorToast(int);
+}
 -keepclasseswithmembers class org.lsposed.manager.receivers.LSPosedManagerServiceClient {
     private static android.os.IBinder binder;
 }
diff --git a/app/src/main/java/org/lsposed/manager/Constants.java b/app/src/main/java/org/lsposed/manager/Constants.java
index 57ab6084..10c87077 100644
--- a/app/src/main/java/org/lsposed/manager/Constants.java
+++ b/app/src/main/java/org/lsposed/manager/Constants.java
@@ -22,21 +22,9 @@ package org.lsposed.manager;
 
 import android.widget.Toast;
 
-@SuppressWarnings({"FieldCanBeLocal", "FieldMayBeFinal"})
 public class Constants {
-    private static int xposedApiVersion = -1;
-    private static String xposedVersion = null;
 
     public static void showErrorToast(int type) {
         Toast.makeText(App.getInstance(), R.string.app_destroyed, Toast.LENGTH_LONG).show();
     }
-
-    // for showing the version mismatch dialog
-    public static String getXposedVersion() {
-        return xposedVersion;
-    }
-
-    public static int getXposedApiVersion() {
-        return xposedApiVersion;
-    }
 }
diff --git a/app/src/main/java/org/lsposed/manager/ui/activity/base/BaseActivity.java b/app/src/main/java/org/lsposed/manager/ui/activity/base/BaseActivity.java
index 29b38641..5bdafaf4 100644
--- a/app/src/main/java/org/lsposed/manager/ui/activity/base/BaseActivity.java
+++ b/app/src/main/java/org/lsposed/manager/ui/activity/base/BaseActivity.java
@@ -34,7 +34,6 @@ import androidx.appcompat.app.AlertDialog;
 import org.lsposed.manager.App;
 import org.lsposed.manager.BuildConfig;
 import org.lsposed.manager.ConfigManager;
-import org.lsposed.manager.Constants;
 import org.lsposed.manager.R;
 import org.lsposed.manager.util.NavUtil;
 import org.lsposed.manager.util.theme.ThemeUtil;
@@ -55,10 +54,6 @@ public class BaseActivity extends MaterialActivity {
 
         // make sure the versions are consistent
         String coreVersionStr = ConfigManager.getXposedVersionName();
-        // for showing the version mismatch dialog
-        if (coreVersionStr == null) {
-            coreVersionStr = Constants.getXposedVersion();
-        }
         if (coreVersionStr != null) {
             if (!BuildConfig.VERSION_NAME.equals(coreVersionStr)) {
                 new AlertDialog.Builder(this)
diff --git a/core/src/main/java/org/lsposed/lspd/hooker/XposedInstallerHooker.java b/core/src/main/java/org/lsposed/lspd/hooker/XposedInstallerHooker.java
index a351b603..462b85fd 100644
--- a/core/src/main/java/org/lsposed/lspd/hooker/XposedInstallerHooker.java
+++ b/core/src/main/java/org/lsposed/lspd/hooker/XposedInstallerHooker.java
@@ -39,19 +39,5 @@ public class XposedInstallerHooker {
         } catch (Throwable t) {
             Utils.logW("Could not hook LSPosed Manager", t);
         }
-
-        // for showing the version mismatch dialog
-        try {
-            Class<?> ConstantsClass = XposedHelpers.findClass("org.lsposed.manager.Constants", classLoader);
-            try {
-                XposedHelpers.setStaticObjectField(ConstantsClass, "xposedVersion", BuildConfig.VERSION_NAME);
-                return;
-            } catch (Throwable ignore) {
-
-            }
-            XposedHelpers.findAndHookMethod(ConstantsClass, "getXposedVersion", XC_MethodReplacement.returnConstant(BuildConfig.VERSION_NAME));
-        } catch (Throwable ignore) {
-
-        }
     }
 }
diff --git a/core/src/main/java/org/lsposed/lspd/service/PackageService.java b/core/src/main/java/org/lsposed/lspd/service/PackageService.java
index d4ff287b..ccbfac9b 100644
--- a/core/src/main/java/org/lsposed/lspd/service/PackageService.java
+++ b/core/src/main/java/org/lsposed/lspd/service/PackageService.java
@@ -252,8 +252,7 @@ public class PackageService {
                 boolean signatureMatch = InstallerVerifier.verifyInstallerSignature(pkgInfo.applicationInfo);
                 if (versionMatch && signatureMatch && pkgInfo.versionCode >= BuildConfig.VERSION_CODE)
                     return false;
-                if (!BuildConfig.DEFAULT_MANAGER_PACKAGE_NAME.equals(packageName) || !signatureMatch
-                        || !versionMatch && pkgInfo.versionCode > BuildConfig.VERSION_CODE)
+                if (!signatureMatch || !versionMatch && pkgInfo.versionCode > BuildConfig.VERSION_CODE)
                     uninstallPackage(new VersionedPackage(pkgInfo.packageName, pkgInfo.versionCode));
             }