diff --git a/app/build.gradle b/app/build.gradle
index aeb10017a..9dec386e1 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -46,7 +46,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.0.13'
+    implementation 'com.simplemobiletools:commons:4.0.15'
     implementation 'joda-time:joda-time:2.9.9'
     implementation 'com.facebook.stetho:stetho:1.5.0'
     implementation 'com.android.support:multidex:1.0.3'
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
index 970ea21a7..586a1300a 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/SettingsActivity.kt
@@ -6,9 +6,13 @@ import android.media.AudioManager
 import android.os.Bundle
 import android.text.TextUtils
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.R.id.*
 import com.simplemobiletools.calendar.dialogs.SelectCalendarsDialog
 import com.simplemobiletools.calendar.extensions.*
-import com.simplemobiletools.calendar.helpers.*
+import com.simplemobiletools.calendar.helpers.CalDAVHandler
+import com.simplemobiletools.calendar.helpers.FONT_SIZE_LARGE
+import com.simplemobiletools.calendar.helpers.FONT_SIZE_MEDIUM
+import com.simplemobiletools.calendar.helpers.FONT_SIZE_SMALL
 import com.simplemobiletools.calendar.models.EventType
 import com.simplemobiletools.commons.dialogs.ConfirmationDialog
 import com.simplemobiletools.commons.dialogs.CustomIntervalPickerDialog
@@ -16,6 +20,7 @@ import com.simplemobiletools.commons.dialogs.RadioGroupDialog
 import com.simplemobiletools.commons.dialogs.SelectAlarmSoundDialog
 import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.ALARM_SOUND_TYPE_NOTIFICATION
+import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import com.simplemobiletools.commons.helpers.PERMISSION_READ_CALENDAR
 import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_CALENDAR
 import com.simplemobiletools.commons.models.AlarmSound
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetListConfigureActivity.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetListConfigureActivity.kt
index 547b066c3..e6bf2dc8f 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetListConfigureActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/activities/WidgetListConfigureActivity.kt
@@ -11,7 +11,6 @@ import com.simplemobiletools.calendar.adapters.EventListAdapter
 import com.simplemobiletools.calendar.extensions.config
 import com.simplemobiletools.calendar.extensions.seconds
 import com.simplemobiletools.calendar.helpers.Formatter
-import com.simplemobiletools.calendar.helpers.IS_CUSTOMIZING_COLORS
 import com.simplemobiletools.calendar.helpers.MyWidgetListProvider
 import com.simplemobiletools.calendar.models.ListEvent
 import com.simplemobiletools.calendar.models.ListItem
@@ -19,6 +18,7 @@ import com.simplemobiletools.calendar.models.ListSection
 import com.simplemobiletools.commons.dialogs.ColorPickerDialog
 import com.simplemobiletools.commons.extensions.adjustAlpha
 import com.simplemobiletools.commons.extensions.setFillWithStroke
+import com.simplemobiletools.commons.helpers.IS_CUSTOMIZING_COLORS
 import kotlinx.android.synthetic.main.widget_config_list.*
 import org.joda.time.DateTime
 import java.util.*
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt
index cce4eb856..c6dd89719 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Constants.kt
@@ -49,7 +49,6 @@ const val LAST_USED_LOCAL_EVENT_TYPE_ID = "last_used_local_event_type_id"
 const val DISPLAY_PAST_EVENTS = "display_past_events"
 const val REPLACE_DESCRIPTION = "replace_description"
 const val SHOW_GRID = "show_grid"
-const val IS_CUSTOMIZING_COLORS = "is_customizing_colors"
 const val LOOP_REMINDERS = "loop_reminders"
 const val DIM_PAST_EVENTS = "dim_past_events"