diff --git a/app/build.gradle b/app/build.gradle
index 1c6045b4..64e96bfc 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -10,6 +10,13 @@ ext {
     // by replacing $PREFIX since app code is dependant on the variant used to build the APK.
     // Currently supported values are: [ "apt-android-7" "apt-android-5" ]
     packageVariant = System.getenv("TERMUX_PACKAGE_VARIANT") ?: "apt-android-7" // Default: "apt-android-7"
+    bootstrapMinSdk = packageVariant == "apt-android-5" ? 21 : 24
+    bootstrapMinRelease = packageVariant == "apt-android-5" ? "5.0" : "7.0"
+    bootstrapMaxSdk = packageVariant == "apt-android-5" ? 23 : null
+    bootstrapMaxRelease = packageVariant == "apt-android-5" ? "6.0" : null
+
+    buildMinSdk = bootstrapMinSdk
+    buildTargetSdk = project.properties.targetSdkVersion.toInteger()
 }
 
 android {
@@ -39,14 +46,20 @@ android {
 
     defaultConfig {
         applicationId "com.termux"
-        minSdkVersion project.properties.minSdkVersion.toInteger()
-        targetSdkVersion project.properties.targetSdkVersion.toInteger()
+        minSdk buildMinSdk
+        targetSdk buildTargetSdk
         versionCode 1020
         versionName "0.119.0-beta.1"
 
         if (appVersionName) versionName = appVersionName
         validateVersionName(versionName)
 
+        buildConfigField "Integer", "TERMUX_APP__BOOTSTRAP_MIN_SDK", project.ext.bootstrapMinSdk.toString()
+        buildConfigField "String", "TERMUX_APP__BOOTSTRAP_MIN_RELEASE",
+                project.ext.bootstrapMinRelease ? "\"" + project.ext.bootstrapMinRelease + "\"" : "null"
+        buildConfigField "Integer", "TERMUX_APP__BOOTSTRAP_MAX_SDK", project.ext.bootstrapMaxSdk.toString()
+        buildConfigField "String", "TERMUX_APP__BOOTSTRAP_MAX_RELEASE",
+                project.ext.bootstrapMaxRelease ? "\"" + project.ext.bootstrapMaxRelease + "\"" : "null"
         buildConfigField "String", "TERMUX_PACKAGE_VARIANT", "\"" + project.ext.packageVariant + "\"" // Used by TermuxApplication class
 
         manifestPlaceholders.TERMUX_PACKAGE_NAME = "com.termux"
diff --git a/app/src/main/java/com/termux/app/TermuxInstaller.java b/app/src/main/java/com/termux/app/TermuxInstaller.java
index 403ab208..690fc482 100644
--- a/app/src/main/java/com/termux/app/TermuxInstaller.java
+++ b/app/src/main/java/com/termux/app/TermuxInstaller.java
@@ -10,10 +10,12 @@ import android.system.Os;
 import android.util.Pair;
 import android.view.WindowManager;
 
+import com.termux.BuildConfig;
 import com.termux.R;
 import com.termux.shared.file.FileUtils;
 import com.termux.shared.shell.command.ExecutionCommand;
 import com.termux.shared.shell.command.runner.app.AppShell;
+import com.termux.shared.termux.TermuxBootstrap;
 import com.termux.shared.termux.crash.TermuxCrashUtils;
 import com.termux.shared.termux.file.TermuxFileUtils;
 import com.termux.shared.interact.MessageDialogUtils;
@@ -104,6 +106,12 @@ final class TermuxInstaller {
             return;
         }
 
+        if (!checkIfMinOrMaxSdkVersionIsIncompatible(activity,
+                BuildConfig.TERMUX_APP__BOOTSTRAP_MIN_SDK, BuildConfig.TERMUX_APP__BOOTSTRAP_MIN_RELEASE,
+                BuildConfig.TERMUX_APP__BOOTSTRAP_MAX_SDK, BuildConfig.TERMUX_APP__BOOTSTRAP_MAX_RELEASE)) {
+            return;
+        }
+
         // If prefix directory exists, even if its a symlink to a valid directory and symlink is not broken/dangling
         if (FileUtils.directoryFileExists(TERMUX_PREFIX_DIR_PATH, true)) {
             if (TermuxFileUtils.isTermuxPrefixDirectoryEmpty()) {
@@ -271,6 +279,42 @@ final class TermuxInstaller {
         }.start();
     }
 
+    public static boolean checkIfMinOrMaxSdkVersionIsIncompatible(Activity activity,
+                                                                  Integer minSdk, String minRelease,
+                                                                  Integer maxSdk, String maxRelease) {
+        if (minSdk != null && Build.VERSION.SDK_INT < minSdk) {
+            String bootstrapErrorMessage = activity.getString(R.string.bootstrap_error_apk_bootstrap_variant_min_sdk_incompatible,
+                    MarkdownUtils.getMarkdownCodeForString(TermuxBootstrap.TERMUX_APP_PACKAGE_VARIANT.getName(), false),
+                    MarkdownUtils.getMarkdownCodeForString(Build.VERSION.RELEASE, false),
+                    Build.VERSION.SDK_INT,
+                    MarkdownUtils.getMarkdownCodeForString(minRelease, false),
+                    minSdk);
+            Logger.logError(LOG_TAG, bootstrapErrorMessage);
+            sendBootstrapCrashReportNotification(activity, bootstrapErrorMessage);
+            MessageDialogUtils.exitAppWithErrorMessage(activity,
+                    activity.getString(R.string.bootstrap_error_title),
+                    bootstrapErrorMessage);
+            return false;
+        }
+
+        if (maxSdk != null && Build.VERSION.SDK_INT > maxSdk) {
+            String bootstrapErrorMessage = activity.getString(R.string.bootstrap_error_apk_bootstrap_variant_max_sdk_incompatible,
+                    MarkdownUtils.getMarkdownCodeForString(TermuxBootstrap.TERMUX_APP_PACKAGE_VARIANT.getName(), false),
+                    MarkdownUtils.getMarkdownCodeForString(Build.VERSION.RELEASE, false),
+                    Build.VERSION.SDK_INT,
+                    MarkdownUtils.getMarkdownCodeForString(maxRelease, false),
+                    maxSdk);
+            Logger.logError(LOG_TAG, bootstrapErrorMessage);
+            sendBootstrapCrashReportNotification(activity, bootstrapErrorMessage);
+            MessageDialogUtils.exitAppWithErrorMessage(activity,
+                    activity.getString(R.string.bootstrap_error_title),
+                    bootstrapErrorMessage);
+            return false;
+        }
+
+        return true;
+    }
+
     public static void showBootstrapErrorDialog(Activity activity, Runnable whenDone, String message) {
         Logger.logErrorExtended(LOG_TAG, "Bootstrap Error:\n" + message);
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index cbd2992b..8c9cd7ae 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -27,10 +27,18 @@
 
     <!-- Termux Bootstrap Packages Installation -->
     <string name="bootstrap_installer_body">Installing bootstrap packages…</string>
-    <string name="bootstrap_error_title">Unable to install bootstrap</string>
+    <string name="bootstrap_error_title">&TERMUX_APP_NAME; Bootstrap Error</string>
     <string name="bootstrap_error_body">&TERMUX_APP_NAME; was unable to install the bootstrap packages.</string>
     <string name="bootstrap_error_abort">Abort</string>
     <string name="bootstrap_error_try_again">Try again</string>
+    <string name="bootstrap_error_apk_bootstrap_variant_min_sdk_incompatible">The APK bootstrap variant %1$s
+        of currently installed &TERMUX_APP_NAME; app is not compatible with the Android version %2$s
+        (sdk `%3$d`) of the device and it requires minimum Android version %4$s (sdk `%5$d`).
+        \n\nUninstall the &TERMUX_APP_NAME; app and reinstall the correct APK build variant.</string>
+    <string name="bootstrap_error_apk_bootstrap_variant_max_sdk_incompatible">The APK bootstrap variant %1$s
+        of currently installed &TERMUX_APP_NAME; app is not compatible with the Android version %2$s
+        (sdk `%3$d`) of the device and it requires maximum Android version %4$s (sdk `%5$d`).
+        \n\nUninstall the &TERMUX_APP_NAME; app and reinstall the correct APK build variant.</string>
     <string name="bootstrap_error_not_primary_user_message">&TERMUX_APP_NAME; can only be run as the primary user.
         \nBootstrap binaries compiled for &TERMUX_APP_NAME; have hardcoded $PREFIX path and cannot be installed
         under any path other than:\n%1$s.</string>