diff --git a/app/build.gradle b/app/build.gradle
index 74fdfb0..c63918f 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -13,7 +13,7 @@ android {
         minSdkVersion 23
         targetSdkVersion 29
         versionCode 14
-        versionName "0.4.99"
+        versionName "0.5.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         resValue "string", "build_time", buildTime()
         setProperty("archivesBaseName", "projectlaogai-$versionName")
diff --git a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/NFCMensaCard.kt b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/NFCMensaCard.kt
index 469f847..e3fbb77 100644
--- a/app/src/main/java/org/mosad/seil0/projectlaogai/controller/NFCMensaCard.kt
+++ b/app/src/main/java/org/mosad/seil0/projectlaogai/controller/NFCMensaCard.kt
@@ -50,7 +50,7 @@ class NFCMensaCard {
          * @param context the context to show the dialog in
          */
         fun readBalance(intent: Intent, context: Context) {
-            val tag: Tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)
+            val tag: Tag? = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG)
             val isoDep = IsoDep.get(tag)
             try {
                 isoDep.connect()
diff --git a/fastlane/metadata/android/en-US/changelogs/14.txt b/fastlane/metadata/android/en-US/changelogs/14.txt
index cc576b3..b3cceea 100644
--- a/fastlane/metadata/android/en-US/changelogs/14.txt
+++ b/fastlane/metadata/android/en-US/changelogs/14.txt
@@ -3,5 +3,6 @@ This release 0.5.0 is called  "artistical Apollon".
 * new: it's now possible to choose a theme (light, dark or black)
 * new: you can now check your current mensa card balance
 * change: updated some libs, updated kotlin to 1.3.41
+* change: added a license dialog for all used libraries
 * fix: the mensa should now show the correct meals on sunday/monday
 * fix: the timetable should now show the correct on the sunday/monday change