diff --git a/.idea/misc.xml b/.idea/misc.xml
index cd2f3a654d..703e5d4b89 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -5,41 +5,6 @@
       <configuration PROFILE_NAME="Debug" CONFIG_NAME="Debug" />
     </configurations>
   </component>
-  <component name="NullableNotNullManager">
-    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
-    <option name="myDefaultNotNull" value="androidx.annotation.NonNull" />
-    <option name="myNullables">
-      <value>
-        <list size="10">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
-          <item index="2" class="java.lang.String" itemvalue="javax.annotation.CheckForNull" />
-          <item index="3" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
-          <item index="4" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
-          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.Nullable" />
-          <item index="6" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNullable" />
-          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.Nullable" />
-          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableDecl" />
-          <item index="9" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NullableType" />
-        </list>
-      </value>
-    </option>
-    <option name="myNotNulls">
-      <value>
-        <list size="9">
-          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
-          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
-          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
-          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
-          <item index="4" class="java.lang.String" itemvalue="androidx.annotation.NonNull" />
-          <item index="5" class="java.lang.String" itemvalue="androidx.annotation.RecentlyNonNull" />
-          <item index="6" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.qual.NonNull" />
-          <item index="7" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullDecl" />
-          <item index="8" class="java.lang.String" itemvalue="org.checkerframework.checker.nullness.compatqual.NonNullType" />
-        </list>
-      </value>
-    </option>
-  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
diff --git a/tangemcard-android/build.gradle b/tangemcard-android/build.gradle
index c0cc82905e..8ecbadcf2b 100644
--- a/tangemcard-android/build.gradle
+++ b/tangemcard-android/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 apply plugin: 'com.github.dcendents.android-maven'
 
-group='com.tangem.wallet'
+group='com.github.TangemCash'
 
 android {
     compileSdkVersion 28
diff --git a/tangemcard-common/build.gradle b/tangemcard-common/build.gradle
index 48aba332b4..a3d3e21bab 100644
--- a/tangemcard-common/build.gradle
+++ b/tangemcard-common/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'java-library'
 apply plugin: 'com.github.dcendents.android-maven'
 
-group='com.tangem.wallet'
+group='com.github.TangemCash'
 
 dependencies {
     def spongycastle_version = "1.56.0.0"
diff --git a/tangemserver-android/build.gradle b/tangemserver-android/build.gradle
index b33f2e7871..6509921743 100644
--- a/tangemserver-android/build.gradle
+++ b/tangemserver-android/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 apply plugin: 'com.github.dcendents.android-maven'
 
-group='com.tangem.wallet'
+group='com.github.TangemCash'
 
 android {
     compileSdkVersion 28