diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 5ff93b87..1f095ae8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -34,9 +34,13 @@
 
         <activity
             android:name=".activities.SplashActivity"
+            android:exported="false"
             android:theme="@style/SplashTheme" />
 
-        <activity android:name=".activities.MainActivity">
+        <activity
+            android:name=".activities.MainActivity"
+            android:exported="true">
+
             <meta-data
                 android:name="android.app.default_searchable"
                 android:resource="@xml/searchable" />
@@ -58,6 +62,7 @@
 
         <activity
             android:name=".activities.SettingsActivity"
+            android:exported="true"
             android:label="@string/settings"
             android:parentActivityName=".activities.MainActivity">
 
@@ -69,10 +74,12 @@
 
         <activity
             android:name=".activities.GroupContactsActivity"
+            android:exported="false"
             android:parentActivityName=".activities.MainActivity" />
 
         <activity
             android:name=".activities.ViewContactActivity"
+            android:exported="true"
             android:label="@string/details"
             android:parentActivityName=".activities.MainActivity"
             android:theme="@style/TranslucentTheme">
@@ -108,6 +115,7 @@
 
         <activity
             android:name=".activities.EditContactActivity"
+            android:exported="true"
             android:parentActivityName=".activities.MainActivity"
             android:theme="@style/TranslucentTheme">
 
@@ -149,6 +157,7 @@
 
         <activity
             android:name=".activities.InsertOrEditContactActivity"
+            android:exported="true"
             android:label="@string/select_contact">
 
             <meta-data
@@ -188,11 +197,13 @@
 
         <activity
             android:name="com.simplemobiletools.commons.activities.AboutActivity"
+            android:exported="false"
             android:label="@string/about"
             android:parentActivityName=".activities.MainActivity" />
 
         <activity
             android:name="com.simplemobiletools.commons.activities.CustomizationActivity"
+            android:exported="false"
             android:label="@string/customize_colors"
             android:parentActivityName=".activities.SettingsActivity" />
 
@@ -214,6 +225,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Red"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_red"
             android:roundIcon="@mipmap/ic_launcher_red"
             android:targetActivity=".activities.SplashActivity">
@@ -227,6 +239,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Pink"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_pink"
             android:roundIcon="@mipmap/ic_launcher_pink"
             android:targetActivity=".activities.SplashActivity">
@@ -240,6 +253,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Purple"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_purple"
             android:roundIcon="@mipmap/ic_launcher_purple"
             android:targetActivity=".activities.SplashActivity">
@@ -253,6 +267,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Deep_purple"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_deep_purple"
             android:roundIcon="@mipmap/ic_launcher_deep_purple"
             android:targetActivity=".activities.SplashActivity">
@@ -266,6 +281,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Indigo"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_indigo"
             android:roundIcon="@mipmap/ic_launcher_indigo"
             android:targetActivity=".activities.SplashActivity">
@@ -279,6 +295,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Blue"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_blue"
             android:roundIcon="@mipmap/ic_launcher_blue"
             android:targetActivity=".activities.SplashActivity">
@@ -292,6 +309,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Light_blue"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_light_blue"
             android:roundIcon="@mipmap/ic_launcher_light_blue"
             android:targetActivity=".activities.SplashActivity">
@@ -305,6 +323,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Cyan"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_cyan"
             android:roundIcon="@mipmap/ic_launcher_cyan"
             android:targetActivity=".activities.SplashActivity">
@@ -318,6 +337,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Teal"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_teal"
             android:roundIcon="@mipmap/ic_launcher_teal"
             android:targetActivity=".activities.SplashActivity">
@@ -331,6 +351,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Green"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_green"
             android:roundIcon="@mipmap/ic_launcher_green"
             android:targetActivity=".activities.SplashActivity">
@@ -344,6 +365,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Light_green"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_light_green"
             android:roundIcon="@mipmap/ic_launcher_light_green"
             android:targetActivity=".activities.SplashActivity">
@@ -357,6 +379,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Lime"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_lime"
             android:roundIcon="@mipmap/ic_launcher_lime"
             android:targetActivity=".activities.SplashActivity">
@@ -370,6 +393,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Yellow"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_yellow"
             android:roundIcon="@mipmap/ic_launcher_yellow"
             android:targetActivity=".activities.SplashActivity">
@@ -383,6 +407,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Amber"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_amber"
             android:roundIcon="@mipmap/ic_launcher_amber"
             android:targetActivity=".activities.SplashActivity">
@@ -396,6 +421,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Orange"
             android:enabled="true"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher"
             android:roundIcon="@mipmap/ic_launcher"
             android:targetActivity=".activities.SplashActivity">
@@ -408,6 +434,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Deep_orange"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_deep_orange"
             android:roundIcon="@mipmap/ic_launcher_deep_orange"
             android:targetActivity=".activities.SplashActivity">
@@ -421,6 +448,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Brown"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_brown"
             android:roundIcon="@mipmap/ic_launcher_brown"
             android:targetActivity=".activities.SplashActivity">
@@ -434,6 +462,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Blue_grey"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_blue_grey"
             android:roundIcon="@mipmap/ic_launcher_blue_grey"
             android:targetActivity=".activities.SplashActivity">
@@ -447,6 +476,7 @@
         <activity-alias
             android:name=".activities.SplashActivity.Grey_black"
             android:enabled="false"
+            android:exported="true"
             android:icon="@mipmap/ic_launcher_grey_black"
             android:roundIcon="@mipmap/ic_launcher_grey_black"
             android:targetActivity=".activities.SplashActivity">