diff --git a/app/build.gradle b/app/build.gradle
index 334aab6b0..92476c2a3 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -58,7 +58,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.16.12'
+    implementation 'com.simplemobiletools:commons:5.16.16'
     implementation 'joda-time:joda-time:2.10.1'
     implementation 'androidx.multidex:multidex:2.0.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-beta2'
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MutableList.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MutableList.kt
deleted file mode 100644
index 66abd2c6a..000000000
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/extensions/MutableList.kt
+++ /dev/null
@@ -1,16 +0,0 @@
-package com.simplemobiletools.calendar.pro.extensions
-
-import com.simplemobiletools.calendar.pro.helpers.CHOPPED_LIST_DEFAULT_SIZE
-
-// inspired by https://stackoverflow.com/questions/2895342/java-how-can-i-split-an-arraylist-in-multiple-small-arraylists/2895365#2895365
-fun MutableList<Long>.getChoppedList(chunkSize: Int = CHOPPED_LIST_DEFAULT_SIZE): ArrayList<ArrayList<Long>> {
-    val parts = ArrayList<ArrayList<Long>>()
-    val listSize = this.size
-    var i = 0
-    while (i < listSize) {
-        val newList = subList(i, Math.min(listSize, i + chunkSize)).toMutableList() as ArrayList<Long>
-        parts.add(newList)
-        i += chunkSize
-    }
-    return parts
-}
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
index 4878387c7..696d37451 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/Constants.kt
@@ -17,7 +17,6 @@ const val CALDAV = "Caldav"
 const val VIEW_TO_OPEN = "view_to_open"
 const val SHORTCUT_NEW_EVENT = "shortcut_new_event"
 const val REGULAR_EVENT_TYPE_ID = 1L
-const val CHOPPED_LIST_DEFAULT_SIZE = 100
 
 const val MONTHLY_VIEW = 1
 const val YEARLY_VIEW = 2
diff --git a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
index 356d9b660..e09774346 100644
--- a/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/calendar/pro/helpers/EventsHelper.kt
@@ -7,6 +7,7 @@ import com.simplemobiletools.calendar.pro.R
 import com.simplemobiletools.calendar.pro.extensions.*
 import com.simplemobiletools.calendar.pro.models.Event
 import com.simplemobiletools.calendar.pro.models.EventType
+import com.simplemobiletools.commons.extensions.getChoppedList
 import com.simplemobiletools.commons.helpers.ensureBackgroundThread
 
 class EventsHelper(val context: Context) {
diff --git a/build.gradle b/build.gradle
index 256ea0838..e3fd3a56e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.41'
+    ext.kotlin_version = '1.3.50'
 
     repositories {
         google()
@@ -10,7 +10,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath "de.timfreiheit.resourceplaceholders:placeholders:0.3"
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index e03cdb52e..1f39dbdca 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Apr 30 17:49:00 CEST 2019
+#Sun Aug 25 21:51:10 CEST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip