diff --git a/.gitmodules b/.gitmodules
index 07847832e..d2edf7b28 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,7 @@
 [submodule "NineChronicles.RPC.Shared"]
 	path = NineChronicles.RPC.Shared
 	url = https://github.com/planetarium/NineChronicles.RPC.Shared.git
+[submodule "Libplanet"]
+	path = Libplanet
+	url = https://github.com/planetarium/libplanet.git
+	branch = public-validator-test
diff --git a/Directory.Build.props b/Directory.Build.props
index ec7a28c36..da7923240 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,5 +1,14 @@
 <Project>
     <PropertyGroup>
         <LibplanetVersion>5.4.2</LibplanetVersion>
+
+        <!-- Fill with Libplanet's absolute path to debug with local Libplanet.
+             Example: $(MSBuildThisFileDirectory).Libplanet -->
+        <LibplanetDirectory>$(MSBuildThisFileDirectory)Libplanet</LibplanetDirectory>
+    </PropertyGroup>
+
+    <PropertyGroup>
+        <UseLocalLibplanet Condition="Exists('$(LibplanetDirectory)')">true</UseLocalLibplanet>
+        <UseLocalLibplanet Condition=" '$(UseLocalLibplanet)' == '' ">false</UseLocalLibplanet>
     </PropertyGroup>
 </Project>
diff --git a/Libplanet b/Libplanet
new file mode 160000
index 000000000..de309156e
--- /dev/null
+++ b/Libplanet
@@ -0,0 +1 @@
+Subproject commit de309156e1253938e2fa83de1eb5e8965feebb3e
diff --git a/Libplanet.Extensions.ForkableActionEvaluator/Libplanet.Extensions.ForkableActionEvaluator.csproj b/Libplanet.Extensions.ForkableActionEvaluator/Libplanet.Extensions.ForkableActionEvaluator.csproj
index 43532bf6c..263bbedd2 100644
--- a/Libplanet.Extensions.ForkableActionEvaluator/Libplanet.Extensions.ForkableActionEvaluator.csproj
+++ b/Libplanet.Extensions.ForkableActionEvaluator/Libplanet.Extensions.ForkableActionEvaluator.csproj
@@ -6,7 +6,12 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
     <PackageReference Include="Libplanet.Action" Version="$(LibplanetVersion)" />
   </ItemGroup>
+
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\src\Libplanet.Action\Libplanet.Action.csproj" />
+  </ItemGroup>
+
 </Project>
diff --git a/Libplanet.Extensions.PluggedActionEvaluator/Libplanet.Extensions.PluggedActionEvaluator.csproj b/Libplanet.Extensions.PluggedActionEvaluator/Libplanet.Extensions.PluggedActionEvaluator.csproj
index c09aef0f8..230f80df5 100644
--- a/Libplanet.Extensions.PluggedActionEvaluator/Libplanet.Extensions.PluggedActionEvaluator.csproj
+++ b/Libplanet.Extensions.PluggedActionEvaluator/Libplanet.Extensions.PluggedActionEvaluator.csproj
@@ -11,8 +11,12 @@
     <ProjectReference Include="..\Lib9c\.Libplanet.Extensions.ActionEvaluatorCommonComponents\Libplanet.Extensions.ActionEvaluatorCommonComponents.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
     <PackageReference Include="Libplanet.Action" Version="$(LibplanetVersion)" />
   </ItemGroup>
 
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\src\Libplanet.Action\Libplanet.Action.csproj" />
+  </ItemGroup>
+
 </Project>
diff --git a/Libplanet.Headless/Libplanet.Headless.csproj b/Libplanet.Headless/Libplanet.Headless.csproj
index ca287875e..b54d56260 100644
--- a/Libplanet.Headless/Libplanet.Headless.csproj
+++ b/Libplanet.Headless/Libplanet.Headless.csproj
@@ -7,9 +7,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Libplanet.Explorer" Version="$(LibplanetVersion)" />
-    <PackageReference Include="Libplanet.Net" Version="$(LibplanetVersion)" />
-    <PackageReference Include="Libplanet.RocksDBStore" Version="$(LibplanetVersion)" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.1" />
     <PackageReference Include="SonarAnalyzer.CSharp" Version="8.49.0.57237">
       <PrivateAssets>all</PrivateAssets>
@@ -21,6 +18,18 @@
     </PackageReference>
   </ItemGroup>
 
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
+    <PackageReference Include="Libplanet.Explorer" Version="$(LibplanetVersion)" />
+    <PackageReference Include="Libplanet.Net" Version="$(LibplanetVersion)" />
+    <PackageReference Include="Libplanet.RocksDBStore" Version="$(LibplanetVersion)" />
+  </ItemGroup>
+
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\tools\Libplanet.Explorer\Libplanet.Explorer.csproj" />
+    <ProjectReference Include="$(LibplanetDirectory)\src\Libplanet.Net\Libplanet.Net.csproj" />
+    <ProjectReference Include="$(LibplanetDirectory)\src\Libplanet.RocksDBStore\Libplanet.RocksDBStore.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\NineChronicles.RPC.Shared\NineChronicles.RPC.Shared\NineChronicles.RPC.Shared.csproj" />
     <ProjectReference Include="..\Libplanet.Extensions.ForkableActionEvaluator\Libplanet.Extensions.ForkableActionEvaluator.csproj" />
diff --git a/NineChronicles.Headless.Executable/NineChronicles.Headless.Executable.csproj b/NineChronicles.Headless.Executable/NineChronicles.Headless.Executable.csproj
index 7ad5a09ec..d4afeff3f 100644
--- a/NineChronicles.Headless.Executable/NineChronicles.Headless.Executable.csproj
+++ b/NineChronicles.Headless.Executable/NineChronicles.Headless.Executable.csproj
@@ -23,7 +23,6 @@
     <PackageReference Include="GraphQL.Client" Version="5.1.1" />
     <PackageReference Include="GraphQL.Client.Serializer.SystemTextJson" Version="5.1.1" />
     <PackageReference Include="Destructurama.Attributed" Version="2.0.0" />
-    <PackageReference Include="Libplanet.Extensions.Cocona" Version="$(LibplanetVersion)" />
     <PackageReference Include="OpenTelemetry.Exporter.Console" Version="1.9.0" />
     <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.9.0" />
     <PackageReference Include="OpenTelemetry.Instrumentation.GrpcNetClient" Version="1.9.0-beta.1" />
@@ -47,6 +46,14 @@
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.0" />
   </ItemGroup>
 
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
+    <PackageReference Include="Libplanet.Extensions.Cocona" Version="$(LibplanetVersion)" />
+  </ItemGroup>
+
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\tools\Libplanet.Extensions.Cocona\Libplanet.Extensions.Cocona.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Lib9c\Lib9c.Utils\Lib9c.Utils.csproj" />
     <ProjectReference Include="..\Lib9c\Lib9c.Abstractions\Lib9c.Abstractions.csproj" />
diff --git a/NineChronicles.Headless.Tests/NineChronicles.Headless.Tests.csproj b/NineChronicles.Headless.Tests/NineChronicles.Headless.Tests.csproj
index 30cc8d8ce..1deb82036 100644
--- a/NineChronicles.Headless.Tests/NineChronicles.Headless.Tests.csproj
+++ b/NineChronicles.Headless.Tests/NineChronicles.Headless.Tests.csproj
@@ -25,7 +25,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Libplanet.Mocks" Version="$(LibplanetVersion)" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="Moq" Version="4.20.70" />
     <PackageReference Include="SonarAnalyzer.CSharp" Version="8.49.0.57237">
@@ -41,6 +40,14 @@
     <PackageReference Include="coverlet.collector" Version="3.2.0" />
   </ItemGroup>
 
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
+    <PackageReference Include="Libplanet.Mocks" Version="$(LibplanetVersion)" />
+  </ItemGroup>
+
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\test\Libplanet.Mocks\Libplanet.Mocks.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\NineChronicles.Headless.Executable.Tests\NineChronicles.Headless.Executable.Tests.csproj" />
     <ProjectReference Include="..\NineChronicles.Headless.Executable\NineChronicles.Headless.Executable.csproj" />
diff --git a/NineChronicles.Headless/NineChronicles.Headless.csproj b/NineChronicles.Headless/NineChronicles.Headless.csproj
index 1cde5a628..8952e41af 100644
--- a/NineChronicles.Headless/NineChronicles.Headless.csproj
+++ b/NineChronicles.Headless/NineChronicles.Headless.csproj
@@ -34,7 +34,6 @@
     <PackageReference Include="GraphQL.Server.Transports.Subscriptions.WebSockets" Version="5.1.1" />
     <PackageReference Include="GraphQL.Server.Ui.Playground" Version="5.1.1" />
     <PackageReference Include="GraphQL.SystemTextJson" Version="4.7.1" />
-    <PackageReference Include="Libplanet.Store.Remote" Version="$(LibplanetVersion)" />
     <PackageReference Include="MagicOnion" Version="6.1.3" />
     <PackageReference Include="MagicOnion.Abstractions" Version="6.1.3" />
     <PackageReference Include="MagicOnion.Server" Version="6.1.3" />
@@ -64,6 +63,15 @@
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="8.0.0" />
   </ItemGroup>
 
+
+  <ItemGroup Condition="!$(UseLocalLibplanet)">
+    <PackageReference Include="Libplanet.Store.Remote" Version="$(LibplanetVersion)" />
+  </ItemGroup>
+
+  <ItemGroup Condition="$(UseLocalLibplanet)">
+    <ProjectReference Include="$(LibplanetDirectory)\src\Libplanet.Store.Remote\Libplanet.Store.Remote.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>