diff --git a/src/main/java/ru/fiw/proxyserver/mixin/YggdrasilInjection.java b/src/main/java/ru/fiw/proxyserver/mixin/YggdrasilInjection.java
new file mode 100644
index 0000000..36667cb
--- /dev/null
+++ b/src/main/java/ru/fiw/proxyserver/mixin/YggdrasilInjection.java
@@ -0,0 +1,46 @@
+package ru.fiw.proxyserver.mixin;
+
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Mutable;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService;
+
+import net.minecraft.client.MinecraftClient;
+import ru.fiw.proxyserver.Config;
+import ru.fiw.proxyserver.ProxyServer;
+import ru.fiw.proxyserver.proxiedObjects.SocksProxy;
+
+@Mixin(MinecraftClient.class)
+public class YggdrasilInjection {
+    @Final
+    @Mutable
+    @Shadow
+    private YggdrasilAuthenticationService authenticationService;
+
+    @Inject(method = "<init>", at = @At("RETURN"))
+    public void initInject(CallbackInfo info) {
+        String playerName = MinecraftClient.getInstance().getSession().getProfile().getName();
+        if (!playerName.equals(Config.lastPlayerName)) {
+            Config.lastPlayerName = playerName;
+            if (Config.accounts.containsKey(playerName)) {
+                ProxyServer.proxy = Config.accounts.get(playerName);
+            } else {
+                if (Config.accounts.containsKey("")) {
+                    ProxyServer.proxy = Config.accounts.get("");
+                }
+            }
+        }
+        
+        java.net.Authenticator.setDefault(new java.net.Authenticator() {
+            protected java.net.PasswordAuthentication getPasswordAuthentication() {
+                return new java.net.PasswordAuthentication(ProxyServer.proxy.username, ProxyServer.proxy.password.toCharArray());
+            }
+        });
+        this.authenticationService = new YggdrasilAuthenticationService(new SocksProxy());
+    }
+}
diff --git a/src/main/java/ru/fiw/proxyserver/proxiedObjects/SocksProxy.java b/src/main/java/ru/fiw/proxyserver/proxiedObjects/SocksProxy.java
new file mode 100644
index 0000000..689fd39
--- /dev/null
+++ b/src/main/java/ru/fiw/proxyserver/proxiedObjects/SocksProxy.java
@@ -0,0 +1,24 @@
+package ru.fiw.proxyserver.proxiedObjects;
+
+import java.net.Proxy;
+import java.net.SocketAddress;
+import java.net.InetSocketAddress;
+
+public class SocksProxy extends Proxy {
+    public SocksProxy() {
+        super(Proxy.Type.HTTP, new InetSocketAddress(0));
+    }
+    
+    @Override
+    public Type type() {
+        return ru.fiw.proxyserver.ProxyServer.proxyEnabled == true ? Proxy.Type.SOCKS : Proxy.Type.DIRECT;
+    }
+
+    @Override
+    public SocketAddress address() {
+        return new InetSocketAddress(
+            ru.fiw.proxyserver.ProxyServer.proxy.getIp(),
+            ru.fiw.proxyserver.ProxyServer.proxy.getPort()
+        );
+    }
+}
diff --git a/src/main/resources/proxyserver.mixins.json b/src/main/resources/proxyserver.mixins.json
index 73c323d..1c2f5e9 100644
--- a/src/main/resources/proxyserver.mixins.json
+++ b/src/main/resources/proxyserver.mixins.json
@@ -8,7 +8,8 @@
   "client": [
     "ClientConnectionInit",
     "MultiplayerScreenOpen",
-    "ScreenAccessor"
+    "ScreenAccessor",
+    "YggdrasilInjection"
   ],
   "injectors": {
     "defaultRequire": 1