diff --git a/app/build.gradle b/app/build.gradle
index 42a9447..a1dd49f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -13,7 +13,7 @@ android {
         minSdk 24
         targetSdk 34
         versionCode 1
-        versionName "1.0"
+        versionName "1.2"
 
         ndk {
             //noinspection ChromeOsAbiSupport
diff --git a/app/src/main/assets/ifv b/app/src/main/assets/ifv
index d0c3546..d7334b0 160000
--- a/app/src/main/assets/ifv
+++ b/app/src/main/assets/ifv
@@ -1 +1 @@
-Subproject commit d0c3546540ad42b9c1c67ff6fc094102bb5ba48d
+Subproject commit d7334b04ce0037e749f7091521bba80d8fceeae5
diff --git a/app/src/main/java/dev/andus/niedu/MainActivity.kt b/app/src/main/java/dev/andus/niedu/MainActivity.kt
index fb1f924..5e6a59c 100644
--- a/app/src/main/java/dev/andus/niedu/MainActivity.kt
+++ b/app/src/main/java/dev/andus/niedu/MainActivity.kt
@@ -48,6 +48,8 @@ class MainActivity : AppCompatActivity() {
 
         installExtensions()
         loadLoginPage()
+
+        UpdateChecker(this).checkForUpdate()
     }
 
     private fun setupGeckoView() {
diff --git a/app/src/main/java/dev/andus/niedu/UpdateChecker.kt b/app/src/main/java/dev/andus/niedu/UpdateChecker.kt
new file mode 100644
index 0000000..4b4f380
--- /dev/null
+++ b/app/src/main/java/dev/andus/niedu/UpdateChecker.kt
@@ -0,0 +1,110 @@
+package dev.andus.niedu
+
+import android.content.Context
+import android.net.Uri
+import androidx.appcompat.app.AlertDialog
+import org.json.JSONObject
+import java.net.URL
+import androidx.browser.customtabs.CustomTabsIntent
+
+class UpdateChecker(private val context: Context) {
+
+    data class ReleaseInfo(
+        val version: String,
+        val downloadUrl: String,
+        val size: Long
+    )
+
+    private fun getCurrentVersion(): String {
+        val packageInfo = context.packageManager.getPackageInfo(context.packageName, 0)
+        return packageInfo.versionName
+    }
+
+    private fun fetchLatestRelease(): ReleaseInfo? {
+        return try {
+            val url = URL("https://api.github.com/repos/AndusDEV/niedu/releases/latest")
+            val connection = url.openConnection()
+            connection.setRequestProperty("Accept", "application/vnd.github.v3+json")
+
+            val response = connection.getInputStream().bufferedReader().use { it.readText() }
+            val jsonObject = JSONObject(response)
+
+            val tagName = jsonObject.getString("tag_name").removePrefix("v")
+            val assets = jsonObject.getJSONArray("assets")
+
+            if (assets.length() > 0) {
+                val downloadUrl = jsonObject.getString("html_url")
+                val apkAsset = assets.getJSONObject(0)
+                val size = apkAsset.getLong("size")
+
+                ReleaseInfo(tagName, downloadUrl, size)
+            } else null
+        } catch (e: Exception) {
+            e.printStackTrace()
+            null
+        }
+    }
+
+    private fun compareVersions(current: String, latest: String): Boolean {
+        val currentParts = current.split(".").map { it.toIntOrNull() ?: 0 }
+        val latestParts = latest.split(".").map { it.toIntOrNull() ?: 0 }
+
+        val maxLength = maxOf(currentParts.size, latestParts.size)
+        val paddedCurrent = currentParts.padEnd(maxLength)
+        val paddedLatest = latestParts.padEnd(maxLength)
+
+        for (i in 0 until maxLength) {
+            if (paddedLatest[i] > paddedCurrent[i]) return true
+            if (paddedLatest[i] < paddedCurrent[i]) return false
+        }
+        return false
+    }
+
+    private fun List<Int>.padEnd(length: Int): List<Int> {
+        return if (size >= length) this
+        else this + List(length - size) { 0 }
+    }
+
+    private fun formatFileSize(bytes: Long): String {
+        val mb = bytes / (1024.0 * 1024.0)
+        return "%.1f MB".format(mb)
+    }
+
+    fun checkForUpdate() {
+        Thread {
+            val currentVersion = getCurrentVersion()
+            val latestRelease = fetchLatestRelease()
+
+            if (latestRelease != null && compareVersions(currentVersion, latestRelease.version)) {
+                (context as MainActivity).runOnUiThread {
+                    showUpdateDialog(currentVersion, latestRelease)
+                }
+            }
+        }.start()
+    }
+
+    private fun showUpdateDialog(currentVersion: String, releaseInfo: ReleaseInfo) {
+        val message = """
+            Nowa aktualizacja dostępna!
+            
+            Aktualna wersja: v$currentVersion
+            Najnowsza wersja: v${releaseInfo.version}
+            Rozmiar pliku do pobrania: ${formatFileSize(releaseInfo.size)}
+            
+            Czy chciałbyś pobrać plik .apk?
+        """.trimIndent()
+
+        AlertDialog.Builder(context)
+            .setTitle("Aktualizacja dostępna")
+            .setMessage(message)
+            .setPositiveButton("Pobierz") { _, _ ->
+                val intent = CustomTabsIntent.Builder()
+                    .setShowTitle(true)
+                    .setUrlBarHidingEnabled(true)
+                    .build()
+                intent.launchUrl(context, Uri.parse(releaseInfo.downloadUrl))
+            }
+            .setNegativeButton("Później", null)
+            .show()
+    }
+}
\ No newline at end of file