diff --git a/.drone.yml b/.drone.yml
index cfb7155..0affa35 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,7 +3,7 @@ name: default
 
 steps:
 - name: assembleRelease
-  image: gradle:jdk8
+  image: nextcloudci/android
   commands:
   - gradle assembleRelease
  
diff --git a/app/build.gradle b/app/build.gradle
index c63918f..1b6aa14 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -55,7 +55,7 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta2'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.0.0'
     implementation 'com.google.android.material:material:1.0.0'
-    implementation 'com.google.code.gson:gson:2.8.5'
+    implementation 'com.google.code.gson:gson:2.8.6'
     implementation 'com.afollestad:aesthetic:1.0.0-beta05'
     implementation 'com.afollestad.material-dialogs:core:3.1.1'
     implementation 'com.afollestad.material-dialogs:color:3.1.1'
diff --git a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/CacheController.kt b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/CacheController.kt
index 09c6aba..c88c1a5 100644
--- a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/CacheController.kt
+++ b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/CacheController.kt
@@ -28,7 +28,9 @@ import com.google.gson.GsonBuilder
 import com.google.gson.JsonParser
 import com.google.gson.reflect.TypeToken
 import org.mosad.seil0.projectlaogai.controller.PreferencesController.Companion.cCourse
-import org.mosad.seil0.projectlaogai.hsoparser.*
+import org.mosad.seil0.projectlaogai.hsoparser.Course
+import org.mosad.seil0.projectlaogai.hsoparser.MensaMenu
+import org.mosad.seil0.projectlaogai.hsoparser.TimetableCourseWeek
 import java.io.BufferedReader
 import java.io.File
 import java.io.FileReader
diff --git a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/PreferencesController.kt b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/PreferencesController.kt
index d6a43fa..f32f6c6 100644
--- a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/PreferencesController.kt
+++ b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/PreferencesController.kt
@@ -24,7 +24,6 @@ package org.mosad.seil0.projectlaogai.controller
 
 import android.content.Context
 import android.graphics.Color
-import org.jetbrains.anko.defaultSharedPreferences
 import org.mosad.seil0.projectlaogai.R
 import org.mosad.seil0.projectlaogai.hsoparser.Course
 
@@ -46,7 +45,10 @@ class PreferencesController {
 
         // the save function
         fun save(context: Context) {
-            val sharedPref = context.defaultSharedPreferences
+            val sharedPref = context.getSharedPreferences(
+                context.getString(R.string.preference_file_key),
+                Context.MODE_PRIVATE
+            )
 
             // save the update times (cache)
             with (sharedPref.edit()) {
@@ -97,7 +99,10 @@ class PreferencesController {
 
         // the load function
         fun load(context: Context) {
-            val sharedPref = context.defaultSharedPreferences
+            val sharedPref = context.getSharedPreferences(
+                context.getString(R.string.preference_file_key),
+                Context.MODE_PRIVATE
+            )
 
             // load the update times (cache)
             coursesCacheTime = sharedPref.getLong(context.getString(
diff --git a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/TCoRAPIController.kt b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/TCoRAPIController.kt
index 2d03274..6f7c00d 100644
--- a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/TCoRAPIController.kt
+++ b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/TCoRAPIController.kt
@@ -37,6 +37,10 @@ import kotlin.Exception
 
 class TCoRAPIController {
 
+    /**
+     * TODO since anko seems dead, we should use coroutines here
+     */
+
     companion object {
         private const val className = "TCoRAPIController"
         private const val tcorBaseURL = "https://tcor.mosad.xyz"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 57efb0b..17d7bf3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -60,6 +60,7 @@
     <string name="timetable_error">Could not load timetable!"</string>
 
     <!-- save keys -->
+    <string name="preference_file_key" translatable="false">org.mosad.seil0.projectlaogai_preferences</string>
     <string name="save_key_course" translatable="false">org.mosad.seil0.projectlaogai.course</string>
     <string name="save_key_courseTTLink" translatable="false">org.mosad.seil0.projectlaogai.courseTTLink</string>
     <string name="save_key_colorPrimary" translatable="false">org.mosad.seil0.projectlaogai.colorPrimary</string>