diff --git a/ShoeStore/ShoeStore/Repositories/IConnectionString.cs b/ShoeStore/ShoeStore/Repositories/IConnectionString.cs
index fb8dabe..6bc84fb 100644
--- a/ShoeStore/ShoeStore/Repositories/IConnectionString.cs
+++ b/ShoeStore/ShoeStore/Repositories/IConnectionString.cs
@@ -6,7 +6,7 @@ using System.Threading.Tasks;
 
 namespace ShoeStore.Repositories;
 
-internal interface IConnectionString
+public interface IConnectionString
 {
-    string ConnectionString { get; }
+    public string ConnectionString { get; }
 }
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/ConnectionString.cs b/ShoeStore/ShoeStore/Repositories/Implementations/ConnectionString.cs
index 2243db0..e332974 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/ConnectionString.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/ConnectionString.cs
@@ -8,6 +8,6 @@ namespace ShoeStore.Repositories.Implementations;
 
 internal class ConnectionString : IConnectionString
 {
-    string IConnectionString.ConnectionString => "";
+    string IConnectionString.ConnectionString => "Server=localhost;Port=5432;Database=BDOTP;User Id=postgres;Password=postgres;";
 }
 
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/FactoryRepository.cs b/ShoeStore/ShoeStore/Repositories/Implementations/FactoryRepository.cs
index cd83fa4..45b3022 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/FactoryRepository.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/FactoryRepository.cs
@@ -1,6 +1,7 @@
 using Dapper;
 using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
+using Npgsql;
 using ShoeStore.Entities;
 using ShoeStore.Entities.Enums;
 using System;
@@ -32,7 +33,7 @@ internal class FactoryRepository : IFactoryRepository
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryInsert = @"
 INSERT INTO Factorys (FactoryName, Manufacturer)
 VALUES (@FactoryName, @Manufacturer)";
@@ -52,7 +53,7 @@ VALUES (@FactoryName, @Manufacturer)";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryUpdate = @"
 UPDATE Factorys
 SET
@@ -75,7 +76,7 @@ WHERE [Id]=@Id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryDelete = @"
 DELETE FROM Factorys
 WHERE Id=@id";
@@ -95,7 +96,7 @@ WHERE Id=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = @"
 SELECT * FROM Factorys
 WHERE Id=@id";
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesReplenishmentRepository.cs b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesReplenishmentRepository.cs
index 992c664..6582d96 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesReplenishmentRepository.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesReplenishmentRepository.cs
@@ -1,6 +1,7 @@
 using Dapper;
 using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
+using Npgsql;
 using ShoeStore.Entities;
 using ShoeStore.Entities.Enums;
 using System;
@@ -30,7 +31,7 @@ internal class ShoesReplenishmentRepository : IShoesReplenishmentRepository
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             connection.Open();
             using var transaction = connection.BeginTransaction();
             var queryInsert = @"
@@ -66,7 +67,7 @@ VALUES (@ShoesReplenishmentId,@ShoesId, @Count)";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryDelete = @"
 DELETE FROM ShoesReplenishments
 WHERE Id=@id";
@@ -86,7 +87,7 @@ WHERE Id=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = @"SELECT * FROM ShoesReplenishments";
             var shoesReplenishments =
             connection.Query<ShoesReplenishment>(querySelect);
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesRepository.cs b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesRepository.cs
index 40fe3f2..4d3f7bd 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesRepository.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesRepository.cs
@@ -2,6 +2,7 @@
 using Microsoft.Extensions.Logging;
 using Microsoft.VisualBasic.FileIO;
 using Newtonsoft.Json;
+using Npgsql;
 using ShoeStore.Entities;
 using ShoeStore.Entities.Enums;
 using System;
@@ -31,7 +32,7 @@ internal class ShoesRepository : IShoesRepository
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryInsert = @"
 INSERT INTO Shoess (ShoesType, Name, Description)
 VALUES (@ShoesType, @Name, @Description)";
@@ -51,7 +52,7 @@ VALUES (@ShoesType, @Name, @Description)";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryUpdate = @"
 UPDATE Shoess
 SET
@@ -74,7 +75,7 @@ WHERE Id=@Id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryDelete = @"
 DELETE FROM Shoess
 WHERE Id=@id";
@@ -93,7 +94,7 @@ WHERE Id=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = @"
 SELECT * FROM Shoess
 WHERE Id=@id";
@@ -117,7 +118,7 @@ WHERE Id=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = "SELECT * FROM Shoess";
             var shoess = connection.Query<Shoes>(querySelect);
             _logger.LogDebug("Полученные объекты: {json}",
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesSaleRepository.cs b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesSaleRepository.cs
index 346b015..60a8c6f 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/ShoesSaleRepository.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/ShoesSaleRepository.cs
@@ -1,6 +1,7 @@
 using Dapper;
 using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
+using Npgsql;
 using ShoeStore.Entities;
 using System;
 using System.Collections.Generic;
@@ -29,7 +30,7 @@ internal class ShoesSaleRepository : IShoesSaleRepository
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryInsert = @"
 INSERT INTO ShoesSales (ShoesId, FactoryId, StoreId, SaleDate, Specificity)
 VALUES (@ShoesId, @FactoryId, @StoreId, @SaleDate, @Specificity)";
@@ -49,7 +50,7 @@ VALUES (@ShoesId, @FactoryId, @StoreId, @SaleDate, @Specificity)";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = "SELECT * FROM ShoesSales";
             var shoesSales =
             connection.Query<ShoesSale>(querySelect);
diff --git a/ShoeStore/ShoeStore/Repositories/Implementations/StoreRepository.cs b/ShoeStore/ShoeStore/Repositories/Implementations/StoreRepository.cs
index 2733b34..03c2290 100644
--- a/ShoeStore/ShoeStore/Repositories/Implementations/StoreRepository.cs
+++ b/ShoeStore/ShoeStore/Repositories/Implementations/StoreRepository.cs
@@ -1,6 +1,7 @@
 using Dapper;
 using Microsoft.Extensions.Logging;
 using Newtonsoft.Json;
+using Npgsql;
 using ShoeStore.Entities;
 using ShoeStore.Entities.Enums;
 using System;
@@ -30,7 +31,7 @@ internal class StoreRepository : IStoreRepository
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryInsert = @"
 INSERT INTO Stores (StoreType, StoreName, Employees, Visitors)
 VALUES (@StoreType, @StoreName, @Employees, @Visitors)";
@@ -49,7 +50,7 @@ VALUES (@StoreType, @StoreName, @Employees, @Visitors)";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryUpdate = @"
 UPDATE Store
 SET
@@ -74,7 +75,7 @@ WHERE Id=@Id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var queryDelete = @"
 DELETE FROM Store
 WHERE Id=@id";
@@ -94,7 +95,7 @@ WHERE Id=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = @"
 SELECT * FROM Store
 WHERE [Id]=@id";
@@ -118,7 +119,7 @@ WHERE [Id]=@id";
         try
         {
             using var connection = new
-            SqlConnection(_connectionString.ConnectionString);
+            NpgsqlConnection(_connectionString.ConnectionString);
             var querySelect = "SELECT * FROM Stores";
             var stores = connection.Query<Store>(querySelect);
             _logger.LogDebug("Полученные объекты: {json}", JsonConvert.SerializeObject(stores));
diff --git a/ShoeStore/ShoeStore/ShoeStore.csproj b/ShoeStore/ShoeStore/ShoeStore.csproj
index a2dd8b6..14f791f 100644
--- a/ShoeStore/ShoeStore/ShoeStore.csproj
+++ b/ShoeStore/ShoeStore/ShoeStore.csproj
@@ -14,6 +14,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="9.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="Npgsql" Version="9.0.2" />
     <PackageReference Include="Serilog" Version="4.1.0" />
     <PackageReference Include="Serilog.Extensions.Logging" Version="8.0.0" />
     <PackageReference Include="Serilog.Settings.Configuration" Version="8.0.4" />