diff --git a/server/src/client/voice/VoiceClientCommandHandler.cpp b/server/src/client/voice/VoiceClientCommandHandler.cpp
index 8368b89..b976a43 100644
--- a/server/src/client/voice/VoiceClientCommandHandler.cpp
+++ b/server/src/client/voice/VoiceClientCommandHandler.cpp
@@ -58,13 +58,13 @@ command_result VoiceClient::handleCommand(ts::Command &command) {
     return SpeakingClient::handleCommand(command);
 }
 
-inline bool calculate_security_level(int& result, ecc_key* pubKey, size_t offset) {
+inline bool calculate_security_level(int& result, ecc_key* pubKey, const std::string& offset) {
     size_t pubLength = 256;
     char pubBuffer[256];
     if((result = ecc_export(reinterpret_cast<unsigned char *>(pubBuffer), &pubLength, PK_PUBLIC, pubKey)) != CRYPT_OK)
         return false;
 
-    std::string hashStr = base64_encode(pubBuffer, pubLength) + to_string(offset);
+    std::string hashStr = base64_encode(pubBuffer, pubLength) + offset;
     char shaBuffer[SHA_DIGEST_LENGTH];
     SHA1((const unsigned char *) hashStr.data(), hashStr.length(), (unsigned char *) shaBuffer);
 
@@ -89,7 +89,7 @@ command_result VoiceClient::handleCommandClientInit(Command &cmd) {
         auto client_identity = this->connection->crypt_setup_handler().identity_key();
 
         int security_level;
-        if(!calculate_security_level(security_level, &*client_identity, cmd["client_key_offset"])) {
+        if(!calculate_security_level(security_level, &*client_identity, cmd["client_key_offset"].string())) {
             logError(this->getServerId(), "[{}] Failed to calculate security level. Error code: {}", CLIENT_STR_LOG_PREFIX, security_level);
             return command_result{error::vs_critical};
         }
diff --git a/shared b/shared
index c079098..d213c0a 160000
--- a/shared
+++ b/shared
@@ -1 +1 @@
-Subproject commit c0790984eeea45c2692680fd133e6048cbafe57c
+Subproject commit d213c0ade0ea0752eec6ce995e661a49a2818a4e