diff --git a/build.gradle b/build.gradle
index 807ad769cf4..b97314ea806 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:3.2.1"
+        classpath "com.android.tools.build:gradle:3.3.2"
         classpath "com.getkeepsafe.dexcount:dexcount-gradle-plugin:0.8.3"
         classpath "org.ajoberstar:grgit:2.3.0"
     }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a0b868f28af..13156305766 100755
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Jan 15 10:13:25 CET 2019
+#Mon Mar 25 11:05:18 CET 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.3-all.zip
diff --git a/mobile/com.sap.sailing.android.buoy.positioning.app/build.gradle b/mobile/com.sap.sailing.android.buoy.positioning.app/build.gradle
index 6ea480a5a95..31773ed1188 100755
--- a/mobile/com.sap.sailing.android.buoy.positioning.app/build.gradle
+++ b/mobile/com.sap.sailing.android.buoy.positioning.app/build.gradle
@@ -88,8 +88,7 @@ android {
 
 dependencies {
     /* local dependencies */
-    implementation project(":mobile:com.sap.sailing.android.shared")
-
+    implementation project(':mobile:com.sap.sailing.android.shared')
     /* JVM tests */
     testImplementation "junit:junit:${rootProject.ext.junit}"
     testImplementation "org.mockito:mockito-core:${rootProject.ext.mockito}"
diff --git a/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.png b/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.png
deleted file mode 100644
index 251d4ba7973..00000000000
Binary files a/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.webp b/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.webp
new file mode 100644
index 00000000000..9e4179c8ddd
Binary files /dev/null and b/mobile/com.sap.sailing.android.buoy.positioning.app/res/drawable-mdpi/working_title.webp differ
diff --git a/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.png b/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.png
deleted file mode 100644
index 7bc1d20bc3c..00000000000
Binary files a/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.webp b/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.webp
new file mode 100644
index 00000000000..321f5c7daad
Binary files /dev/null and b/mobile/com.sap.sailing.android.tracking.app/res/drawable-mdpi/working_title.webp differ
diff --git a/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.png b/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.png
deleted file mode 100644
index 756fbe4f19f..00000000000
Binary files a/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.webp b/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.webp
new file mode 100644
index 00000000000..4cc5fdf0160
Binary files /dev/null and b/mobile/com.sap.sailing.android.tracking.app/res/drawable/picture.webp differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.png b/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.png
deleted file mode 100644
index 91ba46e5c76..00000000000
Binary files a/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.webp b/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.webp
new file mode 100644
index 00000000000..245763e0443
Binary files /dev/null and b/mobile/com.sap.sailing.racecommittee.app/res/drawable-sw720dp/backdrop.webp differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.png b/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.png
deleted file mode 100644
index 51095cd4595..00000000000
Binary files a/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.webp b/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.webp
new file mode 100644
index 00000000000..a568a575245
Binary files /dev/null and b/mobile/com.sap.sailing.racecommittee.app/res/drawable/backdrop.webp differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.png b/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.png
deleted file mode 100644
index b4255dc43b6..00000000000
Binary files a/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.png and /dev/null differ
diff --git a/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.webp b/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.webp
new file mode 100644
index 00000000000..e2b11b3988c
Binary files /dev/null and b/mobile/com.sap.sailing.racecommittee.app/res/drawable/nav_drawer_header.webp differ