diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssetInfo.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssetInfo.java
index 8a145082e..2fca79c2f 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssetInfo.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssetInfo.java
@@ -1,5 +1,8 @@
 package net.kdt.pojavlaunch;
 
+import androidx.annotation.Keep;
+
+@Keep
 public class JAssetInfo
 {
 	public String hash;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssets.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssets.java
index 2f166583d..dc987fad6 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssets.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JAssets.java
@@ -1,9 +1,12 @@
 package net.kdt.pojavlaunch;
 
+import androidx.annotation.Keep;
+
 import com.google.gson.annotations.SerializedName;
 
 import java.util.Map;
 
+@Keep
 public class JAssets {
     @SerializedName("map_to_resources") public boolean mapToResources;
     public Map<String, JAssetInfo> objects;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JMinecraftVersionList.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JMinecraftVersionList.java
index 0f32bebb1..c0a37a63c 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JMinecraftVersionList.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/JMinecraftVersionList.java
@@ -75,6 +75,7 @@ public class JMinecraftVersionList {
                 public String features;
                 public ArgOS os;
 
+                @Keep
                 public static class ArgOS {
                     public String name;
                     public String version;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/AccountSkin.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/AccountSkin.java
deleted file mode 100644
index b9965d1f5..000000000
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/AccountSkin.java
+++ /dev/null
@@ -1,51 +0,0 @@
-package net.kdt.pojavlaunch.value;
-import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
-import android.util.Base64;
-import java.io.File;
-import java.io.IOException;
-import java.util.Map;
-import net.kdt.pojavlaunch.Tools;
-import net.kdt.pojavlaunch.utils.DownloadUtils;
-
-public class AccountSkin {
-    public static Bitmap getSkin(String uuid) throws IOException {
-        Profile p = Tools.GLOBAL_GSON.fromJson(DownloadUtils.downloadString("https://sessionserver.mojang.com/session/minecraft/profile/" + uuid), Profile.class);
-        for (Property property : p.properties) {
-            if (property.name.equals("textures")) {
-                return getSkinFromProperty(Tools.GLOBAL_GSON.fromJson(new String(Base64.decode(property.value, Base64.DEFAULT), "UTF-8"), SkinProperty.class));
-            }
-        }
-        
-        return null;
-    }
-    
-    private static Bitmap getSkinFromProperty(SkinProperty p) throws IOException {
-        for (Map.Entry<String, Texture> texture : p.textures.entrySet()) {
-            if (texture.getKey().equals("SKIN")) {
-                String skinFile = File.createTempFile("skin", ".png", new File(Tools.DIR_DATA, "cache")).getAbsolutePath();
-                Tools.downloadFile(texture.getValue().url.replace("http://","https://"), skinFile);
-                return BitmapFactory.decodeFile(skinFile);
-            }
-        }
-        
-        return null;
-    }
-    
-    public static class Texture {
-        public String url;
-    }
-    
-    public static class SkinProperty {
-        public Map<String, Texture> textures;
-    }
-    
-    public static class Property {
-        public String name, value;
-    }
-    
-    public static class Profile {
-        public Property[] properties;
-    }
-}
-
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/ForgeInstallProfile.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/ForgeInstallProfile.java
index f79d37c0e..86d62a666 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/ForgeInstallProfile.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/ForgeInstallProfile.java
@@ -1,12 +1,16 @@
 package net.kdt.pojavlaunch.value;
 
+import androidx.annotation.Keep;
+
 import net.kdt.pojavlaunch.*;
 
+@Keep
 public class ForgeInstallProfile {
     // ----- < 1.12.2 Forge Install Profile -----
     public ForgeInstallProperties install;
     public JMinecraftVersionList.Version versionInfo;
-    
+
+    @Keep
     public static class ForgeInstallProperties {
         public String profileName;
         public String target;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftAccount.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftAccount.java
index d0966f760..f3a66d86b 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftAccount.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftAccount.java
@@ -9,10 +9,13 @@ import java.io.*;
 import com.google.gson.*;
 import android.graphics.Bitmap;
 import android.util.Base64;
+
+import androidx.annotation.Keep;
+
 import org.apache.commons.io.IOUtils;
 
-public class MinecraftAccount
-{
+@Keep
+public class MinecraftAccount {
     public String accessToken = "0"; // access token
     public String clientToken = "0"; // clientID: refresh and invalidate
     public String profileId = "00000000-0000-0000-0000-000000000000"; // profile UUID, for obtaining skin
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftClientInfo.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftClientInfo.java
index 9d5ead320..653d289ff 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftClientInfo.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftClientInfo.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value;
 
-public class MinecraftClientInfo
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftClientInfo {
 	public String sha1;
 	public int size;
 	public String url;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftLibraryArtifact.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftLibraryArtifact.java
index c55d43b00..ca81364af 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftLibraryArtifact.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/MinecraftLibraryArtifact.java
@@ -1,6 +1,8 @@
 package net.kdt.pojavlaunch.value;
 
-public class MinecraftLibraryArtifact extends MinecraftClientInfo
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftLibraryArtifact extends MinecraftClientInfo {
 	public String path;
 }
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/PerVersionConfig.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/PerVersionConfig.java
index d657de552..5b8837188 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/PerVersionConfig.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/PerVersionConfig.java
@@ -1,5 +1,7 @@
 package net.kdt.pojavlaunch.value;
 
+import androidx.annotation.Keep;
+
 import com.google.gson.JsonSyntaxException;
 import com.google.gson.reflect.TypeToken;
 
@@ -10,6 +12,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.HashMap;
 
+@Keep
 public class PerVersionConfig {
     static File pvcFile;
     public static HashMap<String,VersionConfig> configMap;
@@ -37,6 +40,8 @@ public class PerVersionConfig {
     public static boolean exists() {
         return new File(Tools.DIR_GAME_HOME,"per-version-config.json").exists();
     }
+
+    @Keep
     public static class VersionConfig {
         public String jvmArgs;
         public String gamePath;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/LauncherProfiles.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/LauncherProfiles.java
index b4293b6c6..d370920fe 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/LauncherProfiles.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/LauncherProfiles.java
@@ -3,8 +3,7 @@ import com.google.gson.*;
 import net.kdt.pojavlaunch.*;
 import java.io.*;
 
-public class LauncherProfiles
-{
+public class LauncherProfiles {
     public static MinecraftLauncherProfiles mainProfileJson;
     public static File launcherProfilesFile = new File(Tools.DIR_GAME_NEW + "/launcher_profiles.json");
     public static MinecraftLauncherProfiles update() {
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftAuthenticationDatabase.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftAuthenticationDatabase.java
index 401572d1d..d1c70619e 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftAuthenticationDatabase.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftAuthenticationDatabase.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
 
-public class MinecraftAuthenticationDatabase
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftAuthenticationDatabase {
 	public String accessToken;
     public String displayName;
 	public String username;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherProfiles.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherProfiles.java
index c3f1e54e8..c9b8fcea8 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherProfiles.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherProfiles.java
@@ -1,9 +1,11 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
+import androidx.annotation.Keep;
+
 import java.util.*;
 import net.kdt.pojavlaunch.*;
 
-public class MinecraftLauncherProfiles
-{
+@Keep
+public class MinecraftLauncherProfiles {
 	public Map<String, MinecraftProfile> profiles = new HashMap<>();
 	public boolean profilesWereMigrated;
 	public String clientToken;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherSettings.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherSettings.java
index 91604dce9..14330b3e6 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherSettings.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftLauncherSettings.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
 
-public class MinecraftLauncherSettings
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftLauncherSettings {
 	public boolean enableSnapshots;
 	public boolean enableAdvanced;
 	public boolean keepLauncherOpen;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftProfile.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftProfile.java
index 6736cc89b..ce0cf0f0d 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftProfile.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftProfile.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
 
-public class MinecraftProfile
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftProfile {
 	public String name;
 	public String type;
 	public String created;
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftResolution.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftResolution.java
index 3a9d95210..33bed42b0 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftResolution.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftResolution.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
 
-public class MinecraftResolution
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftResolution {
 	public int width;
 	public int height;
 }
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftSelectedUser.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftSelectedUser.java
index 0bf96e8b6..cc92c978f 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftSelectedUser.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/value/launcherprofiles/MinecraftSelectedUser.java
@@ -1,7 +1,9 @@
 package net.kdt.pojavlaunch.value.launcherprofiles;
 
-public class MinecraftSelectedUser
-{
+import androidx.annotation.Keep;
+
+@Keep
+public class MinecraftSelectedUser {
 	public String account;
 	public String profile;
 }