diff --git a/app/build.gradle b/app/build.gradle
index 598bcaa4..6d43957f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'kotlin-kapt'
 apply plugin: 'kotlin-android-extensions'
 apply plugin: 'kotlinx-serialization'
 
-if (file("google-services.json").exists()) {
+if (file("src/google-services.json").exists() && file("src/debug/google-services.json").exists()) {
     logger.lifecycle("Firebase Enabled")
     apply plugin: 'com.google.gms.google-services'
     apply plugin: 'io.fabric'
@@ -20,18 +20,23 @@ android {
         minSdkVersion 16
         targetSdkVersion 29
         versionCode 42
-        versionName "4.6-beta1"
+        versionName "4.6-alpha1"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
         vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        debug {
+            debuggable true
+            applicationIdSuffix ".debug"
+            versionNameSuffix "-DEBUG"
+
+            buildConfigField('Boolean', 'CENSOR', 'false')
         }
-        buildTypes.each {
-            it.buildConfigField('boolean', 'CENSOR', 'false')
+        release {
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
     kotlinOptions {
diff --git a/app/src/debug/res/values/strings.xml b/app/src/debug/res/values/strings.xml
new file mode 100644
index 00000000..944c7613
--- /dev/null
+++ b/app/src/debug/res/values/strings.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~     Pupil, Hitomi.la viewer for Android
+  ~     Copyright (C) 2020  tom5079
+  ~
+  ~     This program is free software: you can redistribute it and/or modify
+  ~     it under the terms of the GNU General Public License as published by
+  ~     the Free Software Foundation, either version 3 of the License, or
+  ~     (at your option) any later version.
+  ~
+  ~     This program is distributed in the hope that it will be useful,
+  ~     but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~     GNU General Public License for more details.
+  ~
+  ~     You should have received a copy of the GNU General Public License
+  ~     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<resources xmlns:tools="http://schemas.android.com/tools">
+    <string name="app_name" translatable="false" tools:override="true">Pupil-Debug</string>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
index 0d62572b..14f6c3a3 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/MainActivity.kt
@@ -25,6 +25,7 @@ import android.net.Uri
 import android.os.Bundle
 import android.text.*
 import android.text.style.AlignmentSpan
+import android.util.Log
 import android.view.KeyEvent
 import android.view.MotionEvent
 import android.view.View
@@ -51,11 +52,7 @@ import io.fabric.sdk.android.Fabric
 import kotlinx.android.synthetic.main.activity_main.*
 import kotlinx.android.synthetic.main.activity_main_content.*
 import kotlinx.coroutines.*
-import kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
 import kotlinx.serialization.list
-import kotlinx.serialization.stringify
 import xyz.quaver.hitomi.GalleryBlock
 import xyz.quaver.hitomi.doSearch
 import xyz.quaver.hitomi.getGalleryIDsFromNozomi
@@ -123,6 +120,7 @@ class MainActivity : AppCompatActivity() {
         val lockManager = try {
             LockManager(this)
         } catch (e: Exception) {
+            Log.i("PUPILD", e.toString())
             android.app.AlertDialog.Builder(this).apply {
                 setTitle(R.string.warning)
                 setMessage(R.string.lock_corrupted)
@@ -181,7 +179,7 @@ class MainActivity : AppCompatActivity() {
     override fun onDestroy() {
         super.onDestroy()
 
-        (main_recyclerview.adapter as GalleryBlockAdapter).timer.cancel()
+        (main_recyclerview?.adapter as? GalleryBlockAdapter)?.timer?.cancel()
     }
 
     override fun onResume() {
@@ -695,7 +693,6 @@ class MainActivity : AppCompatActivity() {
     }
 
     private var suggestionJob : Job? = null
-    @UseExperimental(ImplicitReflectionSerializer::class)
     private fun setupSearchBar() {
         val searchInputView = findViewById<SearchInputView>(R.id.search_bar_text)
         //Change upper case letters to lower case
@@ -719,12 +716,11 @@ class MainActivity : AppCompatActivity() {
 
         with(main_searchview as FloatingSearchView) {
             val favoritesFile = File(ContextCompat.getDataDir(context), "favorites_tags.json")
-            val json = Json(JsonConfiguration.Stable)
             val serializer = Tag.serializer().list
 
             if (!favoritesFile.exists()) {
                 favoritesFile.createNewFile()
-                favoritesFile.writeText(json.stringify(Tags(listOf())))
+                favoritesFile.writeText(json.stringify(serializer, Tags(listOf())))
             }
 
             setOnMenuItemClickListener {
@@ -842,7 +838,7 @@ class MainActivity : AppCompatActivity() {
                             favorites.add(tag)
                         }
 
-                        favoritesFile.writeText(json.stringify(favorites))
+                        favoritesFile.writeText(json.stringify(serializer, favorites))
                     }
                 }
 
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt b/app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt
index 7af22aec..bde9a89e 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/ReaderActivity.kt
@@ -38,7 +38,6 @@ import io.fabric.sdk.android.Fabric
 import kotlinx.android.synthetic.main.activity_reader.*
 import kotlinx.android.synthetic.main.activity_reader.view.*
 import kotlinx.android.synthetic.main.dialog_numberpicker.view.*
-import kotlinx.serialization.ImplicitReflectionSerializer
 import xyz.quaver.Code
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
@@ -141,7 +140,6 @@ class ReaderActivity : AppCompatActivity() {
         super.onResume()
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {
         menuInflater.inflate(R.menu.reader, menu)
 
diff --git a/app/src/main/java/xyz/quaver/pupil/ui/SettingsActivity.kt b/app/src/main/java/xyz/quaver/pupil/ui/SettingsActivity.kt
index aa09d8a4..ebcdbb77 100644
--- a/app/src/main/java/xyz/quaver/pupil/ui/SettingsActivity.kt
+++ b/app/src/main/java/xyz/quaver/pupil/ui/SettingsActivity.kt
@@ -30,9 +30,8 @@ import androidx.appcompat.app.AppCompatActivity
 import androidx.preference.PreferenceManager
 import com.google.android.material.snackbar.Snackbar
 import kotlinx.android.synthetic.main.settings_activity.*
-import kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.parseList
+import kotlinx.serialization.list
+import kotlinx.serialization.serializer
 import net.rdrei.android.dirchooser.DirectoryChooserActivity
 import xyz.quaver.pupil.Pupil
 import xyz.quaver.pupil.R
@@ -79,7 +78,6 @@ class SettingsActivity : AppCompatActivity() {
         return true
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
         when(requestCode) {
             REQUEST_LOCK -> {
@@ -96,13 +94,13 @@ class SettingsActivity : AppCompatActivity() {
                     val uri = data?.data ?: return
 
                     try {
-                        val json = contentResolver.openInputStream(uri).use { inputStream ->
+                        val str = contentResolver.openInputStream(uri).use { inputStream ->
                             inputStream!!
 
                             inputStream.readBytes().toString(Charset.defaultCharset())
                         }
 
-                        (application as Pupil).favorites.addAll(Json.parseList<Int>(json).also {
+                        (application as Pupil).favorites.addAll(json.parse(Int.serializer().list, str).also {
                             Snackbar.make(
                                 window.decorView,
                                 getString(R.string.settings_restore_successful, it.size),
diff --git a/app/src/main/java/xyz/quaver/pupil/util/ConstValues.kt b/app/src/main/java/xyz/quaver/pupil/util/ConstValues.kt
index fecea791..38b24cf2 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/ConstValues.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/ConstValues.kt
@@ -18,8 +18,13 @@
 
 package xyz.quaver.pupil.util
 
+import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonConfiguration
+
 const val REQUEST_LOCK = 38238
 const val REQUEST_RESTORE = 16546
 const val REQUEST_DOWNLOAD_FOLDER = 3874
 const val REQUEST_DOWNLOAD_FOLDER_OLD = 3425
-const val REQUEST_WRITE_PERMISSION_AND_SAF = 13900
\ No newline at end of file
+const val REQUEST_WRITE_PERMISSION_AND_SAF = 13900
+
+val json = Json(JsonConfiguration.Stable)
\ No newline at end of file
diff --git a/app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt b/app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt
index dd36f28c..46c94eeb 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt
@@ -21,21 +21,17 @@ package xyz.quaver.pupil.util.download
 import android.content.Context
 import android.content.ContextWrapper
 import android.util.Base64
-import android.util.Log
 import androidx.preference.PreferenceManager
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.async
 import kotlinx.coroutines.withContext
-import kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.parse
-import kotlinx.serialization.stringify
 import xyz.quaver.Code
 import xyz.quaver.hitomi.GalleryBlock
 import xyz.quaver.hitomi.Reader
 import xyz.quaver.pupil.util.getCachedGallery
 import xyz.quaver.pupil.util.getDownloadDirectory
+import xyz.quaver.pupil.util.json
 import java.io.File
 import java.net.URL
 
@@ -50,7 +46,6 @@ class Cache(context: Context) : ContextWrapper(context) {
             it.mkdirs()
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     fun getCachedMetadata(galleryID: Int) : Metadata? {
         val file = File(getCachedGallery(galleryID), ".metadata")
 
@@ -58,7 +53,7 @@ class Cache(context: Context) : ContextWrapper(context) {
             return null
 
         return try {
-            Json.parse(file.readText())
+            json.parse(Metadata.serializer(), file.readText())
         } catch (e: Exception) {
             //File corrupted
             file.delete()
@@ -66,14 +61,13 @@ class Cache(context: Context) : ContextWrapper(context) {
         }
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     fun setCachedMetadata(galleryID: Int, metadata: Metadata) {
         val file = File(getCachedGallery(galleryID), ".metadata").also {
             if (!it.exists())
                 it.createNewFile()
         }
 
-        file.writeText(Json.stringify(metadata))
+        file.writeText(json.stringify(Metadata.serializer(), metadata))
     }
 
     suspend fun getThumbnail(galleryID: Int): String? {
@@ -183,12 +177,10 @@ class Cache(context: Context) : ContextWrapper(context) {
     }
 
     fun getImages(galleryID: Int): List<File?>? {
-        val started = System.currentTimeMillis()
         val gallery = getCachedGallery(galleryID)
         val reader = getReaderOrNull(galleryID) ?: return null
         val images = gallery.listFiles() ?: return null
 
-        Log.i("PUPILD", "${System.currentTimeMillis() - started} ms")
         return reader.galleryInfo.indices.map { index ->
             images.firstOrNull { file -> file.name.startsWith("%05d".format(index)) }
         }
diff --git a/app/src/main/java/xyz/quaver/pupil/util/history.kt b/app/src/main/java/xyz/quaver/pupil/util/history.kt
index 665ccdfe..cb13c226 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/history.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/history.kt
@@ -18,15 +18,14 @@
 
 package xyz.quaver.pupil.util
 
-import kotlinx.serialization.ImplicitReflectionSerializer
-import kotlinx.serialization.json.Json
-import kotlinx.serialization.json.JsonConfiguration
-import kotlinx.serialization.parseList
-import kotlinx.serialization.stringify
+import kotlinx.serialization.list
+import kotlinx.serialization.serializer
 import java.io.File
 
 class Histories(private val file: File) : ArrayList<Int>() {
 
+    val serializer = Int.serializer().list
+
     init {
         if (!file.exists())
             file.parentFile?.mkdirs()
@@ -38,21 +37,20 @@ class Histories(private val file: File) : ArrayList<Int>() {
         }
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     fun load() : Histories {
         return apply {
             super.clear()
             addAll(
-                Json(JsonConfiguration.Stable).parseList(
+                json.parse(
+                    serializer,
                     file.bufferedReader().use { it.readText() }
                 )
             )
         }
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     fun save() {
-        file.writeText(Json(JsonConfiguration.Stable).stringify(this))
+        file.writeText(json.stringify(serializer, this))
     }
 
     override fun add(element: Int): Boolean {
diff --git a/app/src/main/java/xyz/quaver/pupil/util/lock.kt b/app/src/main/java/xyz/quaver/pupil/util/lock.kt
index cba085c4..4f48b784 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/lock.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/lock.kt
@@ -21,9 +21,10 @@ package xyz.quaver.pupil.util
 import android.content.Context
 import android.content.ContextWrapper
 import androidx.core.content.ContextCompat
-import kotlinx.serialization.*
+import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonConfiguration
+import kotlinx.serialization.list
 import java.io.File
 import java.security.MessageDigest
 
@@ -73,7 +74,6 @@ class LockManager(base: Context): ContextWrapper(base) {
         load()
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     private fun load() {
         val lock = File(ContextCompat.getDataDir(this), "lock.json")
 
@@ -82,17 +82,16 @@ class LockManager(base: Context): ContextWrapper(base) {
             lock.writeText("[]")
         }
 
-        locks = ArrayList(Json(JsonConfiguration.Stable).parseList(lock.readText()))
+        locks = ArrayList(json.parse(Lock.serializer().list, lock.readText()))
     }
 
-    @UseExperimental(ImplicitReflectionSerializer::class)
     private fun save() {
         val lock = File(ContextCompat.getDataDir(this), "lock.json")
 
         if (!lock.exists())
             lock.createNewFile()
 
-        lock.writeText(Json(JsonConfiguration.Stable).stringify(locks?.toList() ?: listOf()))
+        lock.writeText(json.stringify(Lock.serializer().list, locks?.toList() ?: listOf()))
     }
 
     fun add(lock: Lock) {
diff --git a/app/src/main/java/xyz/quaver/pupil/util/update.kt b/app/src/main/java/xyz/quaver/pupil/util/update.kt
index 6d7c8cfb..94ae9ed1 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/update.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/update.kt
@@ -32,7 +32,10 @@ import androidx.preference.PreferenceManager
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.serialization.json.*
+import kotlinx.serialization.json.JsonArray
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.boolean
+import kotlinx.serialization.json.content
 import ru.noties.markwon.Markwon
 import xyz.quaver.pupil.BuildConfig
 import xyz.quaver.pupil.R
@@ -43,7 +46,7 @@ import java.util.*
 fun getReleases(url: String) : JsonArray {
     return try {
         URL(url).readText().let {
-            Json(JsonConfiguration.Stable).parse(JsonArray.serializer(), it)
+            json.parse(JsonArray.serializer(), it)
         }
     } catch (e: Exception) {
         JsonArray(emptyList())
diff --git a/build.gradle b/build.gradle
index 495dc04c..a1f207cf 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,4 +31,4 @@ allprojects {
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
+}
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index d5fb122a..dcb17194 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,3 +15,4 @@ kotlin.code.style=official
 android.enableJetifier=true
 org.gradle.jvmargs=-Xmx1024M -Dkotlin.daemon.jvm.options\="-Xmx1024M"
 android.useAndroidX=true
+android.enableR8.fullMode=true
\ No newline at end of file