diff --git a/app/build.gradle b/app/build.gradle
index 7ebca1a..71716a0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -34,11 +34,11 @@ android {
 }
 
 dependencies {
-    implementation 'com.google.android.material:material:1.1.0-alpha02'
+    implementation 'com.google.android.material:material:1.1.0-alpha06'
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.robolectric:robolectric:4.1'
-    googleImplementation 'com.google.firebase:firebase-core:16.0.6'
-    googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.9.8'
+    googleImplementation 'com.google.firebase:firebase-core:16.0.8'
+    googleImplementation 'com.crashlytics.sdk.android:crashlytics:2.10.0'
     googleImplementation "com.google.android.gms:play-services-location:16.0.0"
 }
 
diff --git a/app/src/main/java/org/traccar/client/TrackingService.java b/app/src/main/java/org/traccar/client/TrackingService.java
index e1e8c3f..eada89a 100644
--- a/app/src/main/java/org/traccar/client/TrackingService.java
+++ b/app/src/main/java/org/traccar/client/TrackingService.java
@@ -43,7 +43,7 @@ public class TrackingService extends Service {
         NotificationCompat.Builder builder = new NotificationCompat.Builder(context, MainApplication.PRIMARY_CHANNEL)
                 .setSmallIcon(R.drawable.ic_stat_notify)
                 .setPriority(NotificationCompat.PRIORITY_LOW)
-                .setCategory(Notification.CATEGORY_SERVICE);
+                .setCategory(NotificationCompat.CATEGORY_SERVICE);
         Intent intent;
         if (!BuildConfig.HIDDEN_APP) {
             intent = new Intent(context, MainActivity.class);
diff --git a/build.gradle b/build.gradle
index 4beffe9..2e5dd2e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         maven { url 'https://maven.fabric.io/public' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
+        classpath 'com.android.tools.build:gradle:3.4.0'
         classpath 'com.google.gms:google-services:4.2.0'
         classpath 'io.fabric.tools:gradle:1.26.1'
     }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0682df5..d757f3d 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip