diff --git a/include/Database.hpp b/include/Database.hpp
index 937e3d2..9cc3f2e 100644
--- a/include/Database.hpp
+++ b/include/Database.hpp
@@ -25,8 +25,7 @@ class Database {
     void loadFromFile(std::string filename);
     std::vector<std::string> changeString(std::string line);
     void createPersonIn(std::vector<std::string> data);
-
-
+    void modifyAddress(const unsigned long int pesel, std::string newAddress);
 private:
     PeopleBase peopleBase_;
 };
diff --git a/include/Student.hpp b/include/Student.hpp
index 37660a3..9bbe544 100644
--- a/include/Student.hpp
+++ b/include/Student.hpp
@@ -1,4 +1,3 @@
-#pragma once
 #include "../include/Person.hpp"
 #include <vector>
 
diff --git a/src/Database.cpp b/src/Database.cpp
index 8510061..df97610 100644
--- a/src/Database.cpp
+++ b/src/Database.cpp
@@ -37,7 +37,11 @@ void Database::sortByPesel()
 
 void Database::sortBySalary()
 {
-    
+}    
+void Database::modifyAddress(const int pesel, const std::string newAddress)
+{
+    auto person = findByPesel(pesel);
+    person->setAddress(newAddress);
 }
 
 void Database::saveToFile(std::string filename) const
diff --git a/src/main.cpp b/src/main.cpp
index 1a83ab2..473e052 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -32,6 +32,10 @@ int main()
     std::cout<<"Find By Pesel";
 	  Person* ptr= db.findByPesel(10987654321);
 	  std::cout << ptr->getPersonDetails();
+
+    db.modifyAddress(87112345697, "Grabiszynska 9, 53-501 Wrocław");
+    db.showBase();
+
     delete john;
     delete ben;
     return 0;