diff --git a/src/cpp/model/User.cpp b/src/cpp/model/User.cpp
index 9e07451bd..36622023b 100644
--- a/src/cpp/model/User.cpp
+++ b/src/cpp/model/User.cpp
@@ -407,7 +407,7 @@ User::User(Poco::AutoPtr<controller::User> ctrl_user)
 		auto hexStringTemp = mm->getFreeMemory(hexSize);
 		//char* hexString = (char*)malloc(hexSize);
 		memset(*hexStringTemp, 0, hexSize);
-		sodium_bin2hex(*hexStringTemp, hexSize, pubkey, crypto_sign_PUBLICKEYBYTES);
+		sodium_bin2hex((char*)(*hexStringTemp), hexSize, pubkey, crypto_sign_PUBLICKEYBYTES);
 		mPublicHex = *hexStringTemp;
 		mm->releaseMemory(hexStringTemp);
 	}
diff --git a/src/cpp/model/table/ModelBase.h b/src/cpp/model/table/ModelBase.h
index 78cbdcdc4..af917f32a 100644
--- a/src/cpp/model/table/ModelBase.h
+++ b/src/cpp/model/table/ModelBase.h
@@ -139,7 +139,8 @@ namespace model {
 		size_t ModelBase::updateIntoDB(const std::string& fieldName, const T& fieldValue)
 		{
 			auto cm = ConnectionManager::getInstance();
-			Poco::Data::Statement update(cm->getConnection(CONNECTION_MYSQL_LOGIN_SERVER));
+			auto session = cm->getConnection(CONNECTION_MYSQL_LOGIN_SERVER)
+			Poco::Data::Statement update(session);
 
 			if (mID == 0) {
 				addError(new Error("ModelBase::updateIntoDB", "id is zero"));