diff --git a/src/Config/version_info.rc b/src/Config/version_info.rc
index 14016f91..a576468b 100644
--- a/src/Config/version_info.rc
+++ b/src/Config/version_info.rc
@@ -15,8 +15,8 @@
 #endif
 
 VS_VERSION_INFO VERSIONINFO
-FILEVERSION 0, 3, 1, 0
-PRODUCTVERSION 0, 3, 1, 0
+FILEVERSION 0,4,0,0
+PRODUCTVERSION 0,4,0,0
 FILEFLAGSMASK VS_FFI_FILEFLAGSMASK
 FILEFLAGS METIN2_DEBUG
 FILEOS VOS__WINDOWS32
@@ -29,12 +29,12 @@ BEGIN
         BEGIN
 		    VALUE "CompanyName", "The Old Metin2 Project"
             VALUE "FileDescription", METIN2_COMPONENT_DESCRIPTION
-            VALUE "FileVersion", "0.3.1.0"
+            VALUE "FileVersion", "0.4.0.0"
             VALUE "InternalName", METIN2_COMPONENT_INTERNALNAME
-            VALUE "LegalCopyright", "Copyright (C) 2024"
+            VALUE "LegalCopyright", "Copyright (C) 2022-2025"
             VALUE "OriginalFilename", METIN2_COMPONENT_FILENAME
             VALUE "ProductName", "Metin2Config"
-            VALUE "ProductVersion", "0.3.1.0"
+            VALUE "ProductVersion", "0.4.0.0"
         END
     END
 
diff --git a/src/UserInterface/AccountConnector.cpp b/src/UserInterface/AccountConnector.cpp
index e82c8c97..272db8b3 100644
--- a/src/UserInterface/AccountConnector.cpp
+++ b/src/UserInterface/AccountConnector.cpp
@@ -362,8 +362,6 @@ bool CAccountConnector::__AuthState_RecvAuthSuccess()
 	}
 	else
 	{
-		DWORD dwPanamaKey = kAuthSuccessPacket.dwLoginKey ^ g_adwEncryptKey[0] ^ g_adwEncryptKey[1] ^ g_adwEncryptKey[2] ^ g_adwEncryptKey[3];
-
 		CPythonNetworkStream & rkNet = CPythonNetworkStream::Instance();
 		rkNet.SetLoginKey(kAuthSuccessPacket.dwLoginKey);
 		rkNet.Connect(m_strAddr.c_str(), m_iPort);
@@ -389,9 +387,6 @@ bool CAccountConnector::__AuthState_RecvAuthSuccess_OpenID()
 	}
 	else
 	{
-		DWORD dwPanamaKey = kAuthSuccessOpenIDPacket.dwLoginKey ^ g_adwEncryptKey[0] ^ g_adwEncryptKey[1] ^ g_adwEncryptKey[2] ^ g_adwEncryptKey[3];
-		CEterPackManager::instance().DecryptPackIV(dwPanamaKey);
-
 		CPythonNetworkStream & rkNet = CPythonNetworkStream::Instance();
 		rkNet.SetLoginInfo(kAuthSuccessOpenIDPacket.login, "0000");		//OpenID 인증 과정에서 비밀번호는 사용되지 않는다.
 		rkNet.SetLoginKey(kAuthSuccessOpenIDPacket.dwLoginKey);
diff --git a/src/UserInterface/Packet.h b/src/UserInterface/Packet.h
index e86e61d4..baaaf9d7 100644
--- a/src/UserInterface/Packet.h
+++ b/src/UserInterface/Packet.h
@@ -324,12 +324,6 @@ enum
 	// END_OF_SUPPORT_BGM
 
     HEADER_GC_AUTH_SUCCESS                      = 150,
-    HEADER_GC_PANAMA_PACK						= 151,
-
-	//HYBRID CRYPT
-	HEADER_GC_HYBRIDCRYPT_KEYS					= 152,
-	HEADER_GC_HYBRIDCRYPT_SDB					= 153, // SDB means Supplmentary Data Blocks
-	//HYBRID CRYPT
 
 	HEADER_GC_AUTH_SUCCESS_OPENID				= 154,
 
@@ -2612,70 +2606,6 @@ typedef struct SPacketGCResetOnTime
     BYTE header;
 } TPacketGCResetOnTime;
 
-typedef struct SPacketGCPanamaPack
-{
-    BYTE    bHeader;
-    char    szPackName[256];
-    BYTE    abIV[32];
-} TPacketGCPanamaPack;
-
-typedef struct SPacketGCHybridCryptKeys
-{
-private:
-	SPacketGCHybridCryptKeys() : m_pStream(NULL) {}
-
-public:
-	SPacketGCHybridCryptKeys(int iStreamSize) : iKeyStreamLen(iStreamSize)
-	{
-		m_pStream = new BYTE[iStreamSize];
-	}
-	~SPacketGCHybridCryptKeys()
-	{
-		if( m_pStream )
-		{
-			delete[] m_pStream;
-			m_pStream = NULL;
-		}
-	}
-	static int GetFixedHeaderSize() 
-	{
-		return sizeof(BYTE)+sizeof(WORD)+sizeof(int);
-	}
-
-	BYTE	bHeader;
-	WORD    wDynamicPacketSize;
-	int		iKeyStreamLen;
-	BYTE*	m_pStream;
-
-} TPacketGCHybridCryptKeys;
-
-
-typedef struct SPacketGCHybridSDB
-{
-private:
-	SPacketGCHybridSDB() : m_pStream(NULL) {}
-
-public:
-	SPacketGCHybridSDB(int iStreamSize) : iSDBStreamLen(iStreamSize)
-	{
-		m_pStream = new BYTE[iStreamSize];
-	}
-	~SPacketGCHybridSDB()
-	{
-		delete[] m_pStream;
-		m_pStream = NULL;
-	}
-	static int GetFixedHeaderSize()
-	{
-		return sizeof(BYTE)+sizeof(WORD)+sizeof(int);
-	}
-
-	BYTE	bHeader;
-	WORD    wDynamicPacketSize;
-	int		iSDBStreamLen;
-	BYTE*	m_pStream;
-
-} TPacketGCHybridSDB;
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // Client To Client
 
diff --git a/src/UserInterface/PythonNetworkStream.cpp b/src/UserInterface/PythonNetworkStream.cpp
index abc97ee0..b18ce062 100644
--- a/src/UserInterface/PythonNetworkStream.cpp
+++ b/src/UserInterface/PythonNetworkStream.cpp
@@ -176,8 +176,6 @@ class CMainPacketHeaderMap : public CNetworkPacketHeaderMap
 			Set(HEADER_GC_HS_REQUEST, CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketHSCheck), STATIC_SIZE_PACKET));
 			Set(HEADER_GC_XTRAP_CS1_REQUEST, CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketXTrapCSVerify), STATIC_SIZE_PACKET));
 
-			Set(HEADER_GC_HYBRIDCRYPT_KEYS,	CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketGCHybridCryptKeys), DYNAMIC_SIZE_PACKET));
-			Set(HEADER_GC_HYBRIDCRYPT_SDB,	CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketGCHybridSDB), DYNAMIC_SIZE_PACKET));
 			Set(HEADER_GC_SPECIFIC_EFFECT,	CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketGCSpecificEffect), STATIC_SIZE_PACKET));
 			Set(HEADER_GC_DRAGON_SOUL_REFINE,		CNetworkPacketHeaderMap::TPacketType(sizeof(TPacketGCDragonSoulRefine), STATIC_SIZE_PACKET));
 			
diff --git a/src/UserInterface/UserInterface.rc b/src/UserInterface/UserInterface.rc
index 0c13c245..35e6eb3a 100644
--- a/src/UserInterface/UserInterface.rc
+++ b/src/UserInterface/UserInterface.rc
@@ -126,8 +126,8 @@ IDI_METIN2              ICON                    "metin2.ico"
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 0,3,1,0
- PRODUCTVERSION 0,3,1,0
+ FILEVERSION 0,4,0,0
+ PRODUCTVERSION 0,4,0,0
  FILEFLAGSMASK 0x17L
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -144,12 +144,12 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "The Old Metin2 Project"
             VALUE "FileDescription", "The Metin2 Client"
-            VALUE "FileVersion", "0.3.1.0"
+            VALUE "FileVersion", "0.4.0.0"
             VALUE "InternalName", "Metin2Client"
-            VALUE "LegalCopyright", "Copyright (C) 2024"
+            VALUE "LegalCopyright", "Copyright (C) 2022-2025"
             VALUE "OriginalFilename", "Metin2.exe"
             VALUE "ProductName", "Metin2Client"
-            VALUE "ProductVersion", "0.3.1.0"
+            VALUE "ProductVersion", "0.4.0.0"
         END
     END
     BLOCK "VarFileInfo"