diff --git a/modules/docs/src/Volo.Docs.Domain/Volo.Docs.Domain.csproj b/modules/docs/src/Volo.Docs.Domain/Volo.Docs.Domain.csproj
index f8143caa2f..9ad8e3bff6 100644
--- a/modules/docs/src/Volo.Docs.Domain/Volo.Docs.Domain.csproj
+++ b/modules/docs/src/Volo.Docs.Domain/Volo.Docs.Domain.csproj
@@ -18,6 +18,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Http" Version="2.2.0" />
     <PackageReference Include="Octokit" Version="0.29.0" />
   </ItemGroup>
   
diff --git a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/DocsDomainModule.cs b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/DocsDomainModule.cs
index 80f42ed3ff..8adf03faa9 100644
--- a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/DocsDomainModule.cs
+++ b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/DocsDomainModule.cs
@@ -1,4 +1,6 @@
-using Volo.Abp.Domain;
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using Volo.Abp.Domain;
 using Volo.Abp.Localization;
 using Volo.Abp.Modularity;
 using Volo.Abp.VirtualFileSystem;
@@ -35,6 +37,11 @@ namespace Volo.Docs
                 options.Stores[GithubDocumentStore.Type] = typeof(GithubDocumentStore);
                 options.Stores[FileSystemDocumentStore.Type] = typeof(FileSystemDocumentStore);
             });
+
+            context.Services.AddHttpClient(GithubRepositoryManager.HttpClientName, client =>
+            {
+                client.Timeout = TimeSpan.FromMilliseconds(15000);
+            });
         }
     }
 }
diff --git a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubDocumentStore.cs b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubDocumentStore.cs
index 5baa073b9c..715306ae5c 100644
--- a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubDocumentStore.cs
+++ b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubDocumentStore.cs
@@ -1,16 +1,14 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Net;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
-using Octokit;
-using Octokit.Internal;
 using Volo.Abp.Domain.Services;
 using Volo.Docs.Documents;
 using Volo.Docs.GitHub.Projects;
 using Volo.Docs.Projects;
 using Newtonsoft.Json.Linq;
+using Octokit;
 using ProductHeaderValue = Octokit.ProductHeaderValue;
 using Project = Volo.Docs.Projects.Project;
 
@@ -22,6 +20,13 @@ namespace Volo.Docs.GitHub.Documents
     {
         public const string Type = "GitHub";
 
+        private readonly IGithubRepositoryManager _githubRepositoryManager;
+
+        public GithubDocumentStore(IGithubRepositoryManager githubRepositoryManager)
+        {
+            _githubRepositoryManager = githubRepositoryManager;
+        }
+        
         public virtual async Task<Document> GetDocumentAsync(Project project, string documentName, string version)
         {
             var token = project.GetGitHubAccessTokenOrNull();
@@ -102,20 +107,7 @@ namespace Volo.Docs.GitHub.Documents
             var url = project.GetGitHubUrl();
             var ownerName = GetOwnerNameFromUrl(url);
             var repositoryName = GetRepositoryNameFromUrl(url);
-            var gitHubClient = CreateGitHubClient(project.GetGitHubAccessTokenOrNull());
-
-            return await gitHubClient
-                .Repository
-                .Release
-                .GetAll(ownerName, repositoryName);
-        }
-
-        private static GitHubClient CreateGitHubClient(string token = null)
-        {
-            //TODO: Why hard-coded "abpframework"? Should be configurable?
-            return token.IsNullOrWhiteSpace()
-                ? new GitHubClient(new ProductHeaderValue("abpframework"))
-                : new GitHubClient(new ProductHeaderValue("abpframework"), new InMemoryCredentialStore(new Credentials(token)));
+            return await _githubRepositoryManager.GetReleasesAsync(ownerName, repositoryName, project.GetGitHubAccessTokenOrNull());
         }
 
         protected virtual string GetOwnerNameFromUrl(string url)
@@ -151,19 +143,7 @@ namespace Volo.Docs.GitHub.Documents
             {
                 Logger.LogInformation("Downloading content from Github (DownloadWebContentAsStringAsync): " + rawUrl);
 
-                using (var webClient = new GithubWebClient())
-                {
-                    if (!token.IsNullOrWhiteSpace())
-                    {
-                        webClient.Headers.Add("Authorization", "token " + token);
-                    }
-
-                    webClient.Headers.Add("User-Agent", userAgent ?? "");
-                    
-                    //TODO: SET TIMEOUT?
-
-                    return await webClient.DownloadStringTaskAsync(new Uri(rawUrl));
-                }
+                return await _githubRepositoryManager.GetFileRawStringContentAsync(rawUrl, token, userAgent);
             }
             catch (Exception ex)
             {
@@ -179,16 +159,7 @@ namespace Volo.Docs.GitHub.Documents
             {
                 Logger.LogInformation("Downloading content from Github (DownloadWebContentAsByteArrayAsync): " + rawUrl);
 
-                using (var webClient = new GithubWebClient())
-                {
-                    if (!token.IsNullOrWhiteSpace())
-                    {
-                        webClient.Headers.Add("Authorization", "token " + token);
-                    }
-                    webClient.Headers.Add("User-Agent", userAgent ?? "");
-
-                    return await webClient.DownloadDataTaskAsync(new Uri(rawUrl));
-                }
+                return await _githubRepositoryManager.GetFileRawByteArrayContentAsync(rawUrl, token, userAgent);
             }
             catch (Exception ex)
             {
@@ -237,21 +208,5 @@ namespace Volo.Docs.GitHub.Documents
                 .Replace("github.com", "raw.githubusercontent.com")
                 .ReplaceFirst("/tree/", "/");
         }
-
-        private class GithubWebClient : WebClient
-        {
-            protected override WebRequest GetWebRequest(Uri address)
-            {
-                var webRequest = base.GetWebRequest(address);
-                if (webRequest == null)
-                {
-                    return null;
-                }
-
-                webRequest.Timeout = 15000;
-
-                return webRequest;
-            }
-        }
     }
 }
\ No newline at end of file
diff --git a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubRepositoryManager.cs b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubRepositoryManager.cs
new file mode 100644
index 0000000000..be71fd4772
--- /dev/null
+++ b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/GithubRepositoryManager.cs
@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Threading.Tasks;
+using Octokit;
+using Octokit.Internal;
+using ProductHeaderValue = Octokit.ProductHeaderValue;
+
+namespace Volo.Docs.GitHub.Documents
+{
+    public class GithubRepositoryManager : IGithubRepositoryManager
+    {
+        public const string HttpClientName = "GithubRepositoryManagerHttpClientName";
+
+        private readonly IHttpClientFactory _clientFactory;
+
+        public GithubRepositoryManager(IHttpClientFactory clientFactory)
+        {
+            _clientFactory = clientFactory;
+        }
+
+        public async Task<string> GetFileRawStringContentAsync(string rawUrl, string token, string userAgent)
+        {
+            var httpClient = _clientFactory.CreateClient(HttpClientName);
+            if (!token.IsNullOrWhiteSpace())
+            {
+                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Token", token);
+            }
+
+            httpClient.DefaultRequestHeaders.Add("User-Agent", userAgent ?? "");
+
+            return await httpClient.GetStringAsync(new Uri(rawUrl));
+        }
+
+        public async Task<byte[]> GetFileRawByteArrayContentAsync(string rawUrl, string token, string userAgent)
+        {
+            var httpClient = _clientFactory.CreateClient(HttpClientName);
+            if (!token.IsNullOrWhiteSpace())
+            {
+                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Token", token);
+            }
+
+            httpClient.DefaultRequestHeaders.Add("User-Agent", userAgent ?? "");
+
+            return await httpClient.GetByteArrayAsync(new Uri(rawUrl));
+        }
+
+        public async Task<IReadOnlyList<Release>> GetReleasesAsync(string name, string repositoryName, string token)
+        {
+            var client = token.IsNullOrWhiteSpace()
+                ? new GitHubClient(new ProductHeaderValue(name))
+                : new GitHubClient(new ProductHeaderValue(name), new InMemoryCredentialStore(new Credentials(token)));
+
+            return (await client
+                .Repository
+                .Release
+                .GetAll(name, repositoryName)).ToList();
+        }
+    }
+}
diff --git a/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/IGithubRepositoryManager.cs b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/IGithubRepositoryManager.cs
new file mode 100644
index 0000000000..519b9829d5
--- /dev/null
+++ b/modules/docs/src/Volo.Docs.Domain/Volo/Docs/GitHub/Documents/IGithubRepositoryManager.cs
@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using Octokit;
+using Volo.Abp.DependencyInjection;
+
+namespace Volo.Docs.GitHub.Documents
+{
+    public interface IGithubRepositoryManager : ITransientDependency
+    {
+        Task<string> GetFileRawStringContentAsync(string rawUrl, string token, string userAgent);
+
+        Task<byte[]> GetFileRawByteArrayContentAsync(string rawUrl, string token, string userAgent);
+
+        Task<IReadOnlyList<Release>> GetReleasesAsync(string name, string repositoryName, string token);
+
+    }
+}
diff --git a/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/DocsDomainTestBase.cs b/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/DocsDomainTestBase.cs
index 1a34d74ddf..7de6bb3182 100644
--- a/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/DocsDomainTestBase.cs
+++ b/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/DocsDomainTestBase.cs
@@ -1,7 +1,43 @@
-namespace Volo.Docs
+using System;
+using System.Collections.Generic;
+using Microsoft.Extensions.DependencyInjection;
+using NSubstitute;
+using Octokit;
+using Volo.Docs.GitHub.Documents;
+
+namespace Volo.Docs
 {
     public abstract class DocsDomainTestBase : DocsTestBase<DocsDomainTestModule>
     {
-
+        protected override void AfterAddApplication(IServiceCollection services)
+        {
+            var repositoryManager = Substitute.For<IGithubRepositoryManager>();
+            repositoryManager.GetFileRawStringContentAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+                .Returns("stringContent");
+            repositoryManager.GetFileRawByteArrayContentAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+                .Returns(new byte[] { 0x01, 0x02, 0x03 });
+            repositoryManager.GetReleasesAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>())
+                .Returns(new List<Release>
+                {
+                    new Release("https://api.github.com/repos/abpframework/abp/releases/16293679",
+                        "https://github.com/abpframework/abp/releases/tag/0.15.0",
+                        "https://api.github.com/repos/abpframework/abp/releases/16293679/assets",
+                        "https://uploads.github.com/repos/abpframework/abp/releases/16293679/assets{?name,label}",
+                        16293679,
+                        "0.15.0",
+                        "master",
+                        "0.15.0",
+                        "0.15.0 already release",
+                        false,
+                        false,
+                        DateTimeOffset.Parse("2019-03-22T18:43:58Z"),
+                        DateTimeOffset.Parse("2019-03-22T19:44:25Z"),
+                        null,
+                        "https://api.github.com/repos/abpframework/abp/tarball/0.15.0",
+                        "https://api.github.com/repos/abpframework/abp/zipball/0.15.0",
+                        null)
+                });
+            services.AddSingleton(repositoryManager);
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/GithubDocumentStore_Tests.cs b/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/GithubDocumentStore_Tests.cs
new file mode 100644
index 0000000000..ac04ec0e46
--- /dev/null
+++ b/modules/docs/test/Volo.Docs.Domain.Tests/Volo/Docs/GithubDocumentStore_Tests.cs
@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using NSubstitute;
+using Octokit;
+using Shouldly;
+using Volo.Docs.Documents;
+using Volo.Docs.GitHub.Documents;
+using Volo.Docs.Projects;
+using Xunit;
+
+namespace Volo.Docs
+{
+    public class GithubDocumentStore_Tests : DocsDomainTestBase
+    {
+        private readonly IDocumentStoreFactory _documentStoreFactory;
+        private readonly IProjectRepository _projectRepository;
+        private readonly DocsTestData _testData;
+
+        public GithubDocumentStore_Tests()
+        {
+            _documentStoreFactory = GetRequiredService<IDocumentStoreFactory>();
+            _projectRepository = GetRequiredService<IProjectRepository>();
+            _testData = GetRequiredService<DocsTestData>();
+        }
+
+        [Fact]
+        public async Task GetDocumentAsync()
+        {
+            var store = _documentStoreFactory.Create(GithubDocumentStore.Type);
+            var project = await _projectRepository.FindAsync(_testData.PorjectId);
+            project.ShouldNotBeNull();
+            var document = await store.GetDocumentAsync(project, "index2", "0.123.0");
+            document.ShouldNotBeNull();
+
+            document.Title.ShouldBe("index2");
+            document.FileName.ShouldBe("index2");
+            document.Version.ShouldBe("0.123.0");
+            document.Content.ShouldBe("stringContent");
+        }
+
+        [Fact]
+        public async Task GetVersionsAsync()
+        {
+            var store = _documentStoreFactory.Create(GithubDocumentStore.Type);
+            var project = await _projectRepository.FindAsync(_testData.PorjectId);
+            project.ShouldNotBeNull();
+
+            var document = await store.GetVersionsAsync(project);
+            document.ShouldNotBeNull();
+
+            document.Count.ShouldBe(1);
+            document.ShouldContain(x => x.Name == "0.15.0" && x.DisplayName == "0.15.0");
+        }
+
+        [Fact]
+        public async Task GetResource()
+        {
+            var store = _documentStoreFactory.Create(GithubDocumentStore.Type);
+            var project = await _projectRepository.FindAsync(_testData.PorjectId);
+            project.ShouldNotBeNull();
+
+            var documentResource = await store.GetResource(project, "index.md", "0.123.0");
+            documentResource.ShouldNotBeNull();
+
+            documentResource.Content.ShouldBe(new byte[]
+            {
+                0x01, 0x02, 0x03
+            });
+        }
+    }
+}