diff --git a/app/build.gradle b/app/build.gradle
index 8576c6f5..02530dd6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -46,7 +46,7 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-reflect:$kotlin_version"
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.2.1'
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.2.1'
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.11.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.preference:preference:1.1.0'
@@ -60,7 +60,7 @@ dependencies {
     implementation "com.daimajia.swipelayout:library:1.2.0@aar"
     implementation 'com.google.android.material:material:1.2.0-alpha02'
     implementation 'com.google.firebase:firebase-core:17.2.1'
-    implementation 'com.google.firebase:firebase-perf:19.0.2'
+    implementation 'com.google.firebase:firebase-perf:19.0.3'
     implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1'
     implementation 'com.github.arimorty:floatingsearchview:2.1.1'
     implementation 'com.github.clans:fab:1.6.4'
diff --git a/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt b/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
index 801d8d34..663d6fc3 100644
--- a/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
+++ b/app/src/androidTest/java/xyz/quaver/pupil/ExampleInstrumentedTest.kt
@@ -38,6 +38,7 @@ import xyz.quaver.hiyobi.getReader
 import xyz.quaver.hiyobi.user_agent
 import xyz.quaver.pupil.ui.LockActivity
 import xyz.quaver.pupil.util.getDownloadDirectory
+import xyz.quaver.pupil.util.updateOldReaderGalleries
 import java.io.File
 import java.net.URL
 import javax.net.ssl.HttpsURLConnection
@@ -108,4 +109,11 @@ class ExampleInstrumentedTest {
             }
         }
     }
+
+    @Test
+    fun test_updateOldReader() {
+        val context = InstrumentationRegistry.getInstrumentation().targetContext
+
+        updateOldReaderGalleries(context)
+    }
 }
\ No newline at end of file
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 31e4fda0..0a2d76d0 100644
--- a/app/src/main/java/xyz/quaver/pupil/util/update.kt
+++ b/app/src/main/java/xyz/quaver/pupil/util/update.kt
@@ -19,7 +19,8 @@
 package xyz.quaver.pupil.util
 
 import android.content.Context
-import kotlinx.serialization.ImplicitReflectionSerializer
+import kotlinx.serialization.InternalSerializationApi
+import kotlinx.serialization.internal.EnumSerializer
 import kotlinx.serialization.json.*
 import xyz.quaver.availableInHiyobi
 import xyz.quaver.hitomi.Reader
@@ -91,7 +92,7 @@ fun getOldReaderGalleries(context: Context) : List<File> {
     return oldGallery
 }
 
-@UseExperimental(ImplicitReflectionSerializer::class)
+@UseExperimental(InternalSerializationApi::class)
 fun updateOldReaderGalleries(context: Context) {
 
     val json = Json(JsonConfiguration.Stable)
@@ -100,11 +101,13 @@ fun updateOldReaderGalleries(context: Context) {
        val reader = json.parseJson(File(gallery, "reader.json").readText())
            .jsonObject.toMutableMap()
 
+       val codeSerializer = EnumSerializer(Reader.Code::class)
+
        reader["code"] = when {
            (File(gallery, "images").list()?.
                all { !it.endsWith("webp") } ?: return@forEach) &&
-                   availableInHiyobi(gallery.name.toInt()) -> json.toJson(Reader.Code.HIYOBI)
-           else -> json.toJson(Reader.Code.HITOMI)
+                   availableInHiyobi(gallery.name.toInt()) -> json.toJson(codeSerializer, Reader.Code.HIYOBI)
+           else -> json.toJson(codeSerializer, Reader.Code.HITOMI)
        }
 
        File(gallery, "reader.json").writeText(JsonObject(reader).toString())
diff --git a/libpupil/build.gradle b/libpupil/build.gradle
index 5a3ea8bf..055ae4dd 100644
--- a/libpupil/build.gradle
+++ b/libpupil/build.gradle
@@ -6,7 +6,7 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.2.1'
-    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.11.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.14.0"
     implementation 'org.jsoup:jsoup:1.11.3'
     testImplementation 'junit:junit:4.12'
 }