diff --git a/.travis.yml b/.travis.yml
index c37a8882a..4eb15d049 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ android:
     - tools
     - platform-tools
     - tools # called twice to get the newest android sdk tools
-    - build-tools-27.0.3
+    - build-tools-28.0.0
     - android-27
     - extra-android-m2repository
     - extra-google-m2repository
diff --git a/app/dependencies.gradle b/app/dependencies.gradle
index 24c889675..87d2168b7 100644
--- a/app/dependencies.gradle
+++ b/app/dependencies.gradle
@@ -2,9 +2,9 @@ dependencies {
     // kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${kotlinVersion}"
     implementation "org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}"
-    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:0.22.5"
-    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:0.22.5"
-    implementation "ru.gildor.coroutines:kotlin-coroutines-retrofit:0.10.0"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:0.23.3"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:0.23.3"
+    implementation "ru.gildor.coroutines:kotlin-coroutines-retrofit:0.11.0"
 
     // networking
     def okhttpVersion = '3.10.0'
diff --git a/build.gradle b/build.gradle
index b0e8fc2fa..8be4c6247 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,8 +3,8 @@
 buildscript {
     ext {
         // shared build properties
-        kotlinVersion       = '1.2.41'
-        buildToolsVersion   = '27.0.3'
+        kotlinVersion       = '1.2.50'
+        buildToolsVersion   = '28.0.0'
         minSdkVersion       = 16
         targetSdkVersion    = 27
         compileSdkVersion   = 27
@@ -21,7 +21,7 @@ buildscript {
         maven { url 'https://maven.fabric.io/public' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.1.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}"
         classpath "com.google.gms:google-services:4.0.1"
         classpath "io.fabric.tools:gradle:1.25.4"