diff --git a/.idea/appInsightsSettings.xml b/.idea/appInsightsSettings.xml
index 6830952..cb7184b 100644
--- a/.idea/appInsightsSettings.xml
+++ b/.idea/appInsightsSettings.xml
@@ -17,20 +17,6 @@
               </option>
               <option name="signal" value="SIGNAL_UNSPECIFIED" />
               <option name="timeIntervalDays" value="THIRTY_DAYS" />
-              <option name="versions">
-                <list>
-                  <VersionSetting>
-                    <option name="buildVersion" value="17" />
-                    <option name="displayName" value="2.0.1 (17)" />
-                    <option name="displayVersion" value="2.0.1" />
-                  </VersionSetting>
-                  <VersionSetting>
-                    <option name="buildVersion" value="16" />
-                    <option name="displayName" value="2.0.0prod (16)" />
-                    <option name="displayVersion" value="2.0.0prod" />
-                  </VersionSetting>
-                </list>
-              </option>
               <option name="visibilityType" value="ALL" />
             </InsightsFilterSettings>
           </value>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 5bb575c..7b35623 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="EntryPointsManager">
     <list size="2">
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index ff7463c..8cbe1a6 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -33,8 +33,8 @@ android {
         applicationId = "ru.n08i40k.polytechnic.next"
         minSdk = 26
         targetSdk = 35
-        versionCode = 18
-        versionName = "2.0.2"
+        versionCode = 19
+        versionName = "2.0.3"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/service/CurrentLessonViewService.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/service/CurrentLessonViewService.kt
index 92ef359..c7ab817 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/service/CurrentLessonViewService.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/service/CurrentLessonViewService.kt
@@ -102,7 +102,7 @@ class CurrentLessonViewService : Service() {
             }
 
             val firstLessonIdx =
-                day!!.distanceToNextByLocalDateTime(LocalDateTime(0, 0, 0, 0, 0))?.first
+                day!!.distanceToNextByLocalDateTime(LocalDateTime(1, 1, 1, 0, 0))?.first
                     ?: throw NullPointerException("Is this even real?")
             val distanceToFirst = day!!.lessons[firstLessonIdx]!!.time!!.start.dayMinutes - currentMinutes
 
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/PolytechnicApp.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/PolytechnicApp.kt
index f487e7e..cd48bbc 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/PolytechnicApp.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/PolytechnicApp.kt
@@ -1,10 +1,15 @@
 package ru.n08i40k.polytechnic.next.ui
 
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.runBlocking
+import ru.n08i40k.polytechnic.next.settings.settingsDataStore
 import ru.n08i40k.polytechnic.next.ui.auth.AuthScreen
 import ru.n08i40k.polytechnic.next.ui.main.MainScreen
 import ru.n08i40k.polytechnic.next.ui.theme.AppTheme
@@ -15,10 +20,15 @@ import ru.n08i40k.polytechnic.next.ui.theme.AppTheme
 fun PolytechnicApp() {
     AppTheme(darkTheme = true, content = {
         val navController = rememberNavController()
+        val context = LocalContext.current
+
+        val accessToken = runBlocking {
+            context.settingsDataStore.data.map { it.accessToken }.first()
+        }
 
         NavHost(
             navController = navController,
-            startDestination = "auth"
+            startDestination = if (accessToken.isEmpty()) "auth" else "main"
         ) {
             composable(route = "auth") {
                 AuthScreen(navController)
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
index 39aaa91..18bbf7c 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/ui/main/MainScreen.kt
@@ -47,7 +47,6 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
-import androidx.core.content.ContextCompat.startActivity
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -134,7 +133,7 @@ private fun NavHostContainer(
 }
 
 private fun openLink(context: Context, link: String) {
-    startActivity(context, Intent(Intent.ACTION_VIEW, Uri.parse(link)), null)
+    context.startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(link)), null)
 }
 
 @Composable
diff --git a/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt b/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
index 2c2e7b2..eb7cec5 100644
--- a/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
+++ b/app/src/main/java/ru/n08i40k/polytechnic/next/work/LinkUpdateWorker.kt
@@ -3,12 +3,21 @@ package ru.n08i40k.polytechnic.next.work
 import android.content.Context
 import androidx.work.Worker
 import androidx.work.WorkerParameters
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.runBlocking
 import ru.n08i40k.polytechnic.next.PolytechnicApplication
+import ru.n08i40k.polytechnic.next.settings.settingsDataStore
 
 class LinkUpdateWorker(context: Context, params: WorkerParameters) :
     Worker(context, params) {
     override fun doWork(): Result {
+        val accessToken = runBlocking {
+            applicationContext.settingsDataStore.data.map { it.accessToken }.first()
+        }
+        if (accessToken.isEmpty())
+            return Result.retry()
+
         runBlocking {
             (applicationContext as PolytechnicApplication)
                 .container
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index fda4145..3624dca 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,25 +1,25 @@
 [versions]
 accompanistSwiperefresh = "0.36.0"
-agp = "8.7.1"
-firebaseBom = "33.4.0"
+agp = "8.7.2"
+firebaseBom = "33.5.1"
 hiltAndroid = "2.52"
 hiltAndroidCompiler = "2.52"
 hiltNavigationCompose = "1.2.0"
 kotlin = "2.0.10"
-coreKtx = "1.13.1"
+coreKtx = "1.15.0"
 junit = "4.13.2"
 junitVersion = "1.2.1"
 espressoCore = "3.6.1"
 kotlinxSerializationJson = "1.7.3"
-lifecycleRuntimeKtx = "2.8.6"
+lifecycleRuntimeKtx = "2.8.7"
 activityCompose = "1.9.3"
-composeBom = "2024.10.00"
+composeBom = "2024.10.01"
 protobufLite = "3.0.1"
 volley = "1.2.1"
 datastore = "1.1.1"
 navigationCompose = "2.8.3"
 googleFirebaseCrashlytics = "3.0.2"
-workRuntime = "2.9.1"
+workRuntime = "2.10.0"
 
 [libraries]
 accompanist-swiperefresh = { module = "com.google.accompanist:accompanist-swiperefresh", version.ref = "accompanistSwiperefresh" }
@@ -40,7 +40,7 @@ androidx-ui = { group = "androidx.compose.ui", name = "ui" }
 androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
 androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
 androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
-androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest", version = "1.7.4" }
+androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest", version = "1.7.5" }
 androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
 kotlinx-datetime = { module = "org.jetbrains.kotlinx:kotlinx-datetime", version = "0.6.1" }
@@ -49,10 +49,10 @@ protobuf-lite = { module = "com.google.protobuf:protobuf-lite", version.ref = "p
 volley = { group = "com.android.volley", name = "volley", version.ref = "volley" }
 androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
 firebase-bom = { module = "com.google.firebase:firebase-bom", version.ref = "firebaseBom" }
-firebase-analytics = { module = "com.google.firebase:firebase-analytics" }
-firebase-crashlytics = { group = "com.google.firebase", name = "firebase-crashlytics" }
-firebase-messaging = { group = "com.google.firebase", name = "firebase-messaging" }
-firebase-config = { group = "com.google.firebase", name = "firebase-config" }
+firebase-analytics = { module = "com.google.firebase:firebase-analytics", version = "22.1.2" }
+firebase-crashlytics = { group = "com.google.firebase", name = "firebase-crashlytics", version = "19.2.1" }
+firebase-messaging = { group = "com.google.firebase", name = "firebase-messaging", version = "24.0.3" }
+firebase-config = { group = "com.google.firebase", name = "firebase-config", version = "22.0.1" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }