diff --git a/app/build.gradle b/app/build.gradle
index 67b2ff5a9..e1d6f00cd 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -28,9 +28,9 @@ android {
         versionName getVersionName()
 
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
-        minSdkVersion 22
+        minSdkVersion 24
         //noinspection ExpiredTargetSdkVersion
-        targetSdkVersion 25
+        targetSdkVersion 28
         /*
           The Android Testing Support Library collects analytics to continuously improve the testing
           experience. More specifically, it uploads a hash of the package name of the application
diff --git a/app/src/basic/res/drawable-hdpi/ic_launcher.png b/app/src/basic/res/drawable-hdpi/ic_launcher.png
index 2bd09fdb4..26069436f 100644
Binary files a/app/src/basic/res/drawable-hdpi/ic_launcher.png and b/app/src/basic/res/drawable-hdpi/ic_launcher.png differ
diff --git a/app/src/basic/res/drawable-ldpi/ic_launcher.png b/app/src/basic/res/drawable-ldpi/ic_launcher.png
deleted file mode 100644
index 8769b57f6..000000000
Binary files a/app/src/basic/res/drawable-ldpi/ic_launcher.png and /dev/null differ
diff --git a/app/src/basic/res/drawable-mdpi/ic_launcher.png b/app/src/basic/res/drawable-mdpi/ic_launcher.png
index 650c59c48..14fd5a23d 100644
Binary files a/app/src/basic/res/drawable-mdpi/ic_launcher.png and b/app/src/basic/res/drawable-mdpi/ic_launcher.png differ
diff --git a/app/src/basic/res/drawable-xhdpi/ic_launcher.png b/app/src/basic/res/drawable-xhdpi/ic_launcher.png
index 26613b9ad..1e7c68b52 100644
Binary files a/app/src/basic/res/drawable-xhdpi/ic_launcher.png and b/app/src/basic/res/drawable-xhdpi/ic_launcher.png differ
diff --git a/app/src/basic/res/drawable-xxhdpi/ic_launcher.png b/app/src/basic/res/drawable-xxhdpi/ic_launcher.png
index 4d5c9b09f..f4518d718 100644
Binary files a/app/src/basic/res/drawable-xxhdpi/ic_launcher.png and b/app/src/basic/res/drawable-xxhdpi/ic_launcher.png differ
diff --git a/app/src/basic/res/drawable-xxxhdpi/ic_launcher.png b/app/src/basic/res/drawable-xxxhdpi/ic_launcher.png
index e22ab2355..6223f383a 100644
Binary files a/app/src/basic/res/drawable-xxxhdpi/ic_launcher.png and b/app/src/basic/res/drawable-xxxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/drawable-hdpi/ic_launcher.png b/app/src/main/res/drawable-hdpi/ic_launcher.png
index 3640e3ba3..26069436f 100644
Binary files a/app/src/main/res/drawable-hdpi/ic_launcher.png and b/app/src/main/res/drawable-hdpi/ic_launcher.png differ
diff --git a/app/src/main/res/drawable-ldpi/ic_launcher.png b/app/src/main/res/drawable-ldpi/ic_launcher.png
deleted file mode 100644
index 8cf89ef49..000000000
Binary files a/app/src/main/res/drawable-ldpi/ic_launcher.png and /dev/null differ
diff --git a/app/src/main/res/drawable-mdpi/ic_launcher.png b/app/src/main/res/drawable-mdpi/ic_launcher.png
index 2f491147f..14fd5a23d 100644
Binary files a/app/src/main/res/drawable-mdpi/ic_launcher.png and b/app/src/main/res/drawable-mdpi/ic_launcher.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_launcher.png b/app/src/main/res/drawable-xhdpi/ic_launcher.png
index c0560bb39..1e7c68b52 100644
Binary files a/app/src/main/res/drawable-xhdpi/ic_launcher.png and b/app/src/main/res/drawable-xhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_launcher.png b/app/src/main/res/drawable-xxhdpi/ic_launcher.png
index d815ea0db..f4518d718 100644
Binary files a/app/src/main/res/drawable-xxhdpi/ic_launcher.png and b/app/src/main/res/drawable-xxhdpi/ic_launcher.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_launcher.png b/app/src/main/res/drawable-xxxhdpi/ic_launcher.png
index 6107595cf..6223f383a 100644
Binary files a/app/src/main/res/drawable-xxxhdpi/ic_launcher.png and b/app/src/main/res/drawable-xxxhdpi/ic_launcher.png differ
diff --git a/build.gradle b/build.gradle
index 4bc99107e..68e879945 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter() // download from jCenter as last resort https://blog.autsoft.hu/a-confusing-dependency
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.3'
+        classpath 'com.android.tools.build:gradle:4.2.1'
     }
 }
 allprojects {
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 5a035b6c8..36ee71d4f 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,5 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip
 #distributionSha256Sum=e58cdff0cee6d9b422dcd08ebeb3177bc44eaa09bd9a2e838ff74c408fe1cbcd