diff --git a/app/build.gradle b/app/build.gradle
index 3f9412a79..3b8a6bd4d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -277,13 +277,13 @@ dependencies {
     implementation 'com.github.tobiaskaminsky:ImagePicker:extraFile-SNAPSHOT'
     implementation 'com.elyeproj.libraries:loaderviewlibrary:2.0.0'
 
-    testImplementation 'junit:junit:4.13'
+    testImplementation 'junit:junit:4.13.2'
     testImplementation 'org.mockito:mockito-core:3.9.0'
     testImplementation "org.powermock:powermock-core:${powermockVersion}"
     testImplementation "org.powermock:powermock-module-junit4:${powermockVersion}"
     testImplementation "org.powermock:powermock-api-mockito2:${powermockVersion}"
 
-    androidTestImplementation ('androidx.test.espresso:espresso-core:3.1.0-alpha4', {
+    androidTestImplementation ('androidx.test.espresso:espresso-core:3.3.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     findbugsPlugins 'com.h3xstream.findsecbugs:findsecbugs-plugin:1.11.0'
diff --git a/app/src/main/java/com/nextcloud/talk/webrtc/MagicPeerConnectionWrapper.java b/app/src/main/java/com/nextcloud/talk/webrtc/MagicPeerConnectionWrapper.java
index 7b1be0dd6..8d1041c83 100644
--- a/app/src/main/java/com/nextcloud/talk/webrtc/MagicPeerConnectionWrapper.java
+++ b/app/src/main/java/com/nextcloud/talk/webrtc/MagicPeerConnectionWrapper.java
@@ -329,7 +329,6 @@ public class MagicPeerConnectionWrapper {
     }
 
     private class MagicPeerConnectionObserver implements PeerConnection.Observer {
-        private final String TAG = "MagicPeerConnectionObserver";
 
         @Override
         public void onSignalingChange(PeerConnection.SignalingState signalingState) {
@@ -425,7 +424,7 @@ public class MagicPeerConnectionWrapper {
     }
 
     private class MagicSdpObserver implements SdpObserver {
-        private final String TAG = "MagicSdpObserver";
+        private static final String TAG = "MagicSdpObserver";
 
         @Override
         public void onCreateFailure(String s) {
diff --git a/build.gradle b/build.gradle
index fbe358efa..ee2bbb77a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@
 buildscript {
 
     ext {
-        kotlinVersion = '1.3.50'
+        kotlinVersion = '1.4.32'
     }
 
     repositories {