diff --git a/UET/Redpoint.Uet.BuildPipeline.Tests/BuildGraphGeneratorTests.cs b/UET/Redpoint.Uet.BuildPipeline.Tests/BuildGraphGeneratorTests.cs
index 137b45b5..2276897b 100644
--- a/UET/Redpoint.Uet.BuildPipeline.Tests/BuildGraphGeneratorTests.cs
+++ b/UET/Redpoint.Uet.BuildPipeline.Tests/BuildGraphGeneratorTests.cs
@@ -114,6 +114,7 @@ public async void CanGenerateBuildGraphForPlugin()
{ $"PluginName", $"OnlineSubsystemRedpointEOS" },
{ $"Distribution", $"Default" },
{ $"IsUnrealEngine5", $"true" },
+ { $"Timestamp", $"0" },
{ $"CleanDirectories", $"" },
{ $"ExecuteBuild", $"true" },
{ $"EditorTargetPlatforms", $"Win64" },
diff --git a/UET/Redpoint.Uet.BuildPipeline/BuildGraph/BuildGraph_Project.xml b/UET/Redpoint.Uet.BuildPipeline/BuildGraph/BuildGraph_Project.xml
index e366ab73..86c3122a 100644
--- a/UET/Redpoint.Uet.BuildPipeline/BuildGraph/BuildGraph_Project.xml
+++ b/UET/Redpoint.Uet.BuildPipeline/BuildGraph/BuildGraph_Project.xml
@@ -14,6 +14,7 @@
+
@@ -292,6 +293,7 @@
+
@@ -327,6 +329,7 @@
+
@@ -387,6 +390,7 @@
+
@@ -422,6 +426,7 @@
+
diff --git a/UET/uet/Commands/Build/DefaultBuildSpecificationGenerator.cs b/UET/uet/Commands/Build/DefaultBuildSpecificationGenerator.cs
index fffcf907..3bdc6641 100644
--- a/UET/uet/Commands/Build/DefaultBuildSpecificationGenerator.cs
+++ b/UET/uet/Commands/Build/DefaultBuildSpecificationGenerator.cs
@@ -624,6 +624,7 @@ public async Task BuildConfigProjectToBuildSpecAsync(
{ $"UProjectPath", $"__REPOSITORY_ROOT__/{distribution.FolderName}/{distribution.ProjectName}.uproject" },
{ $"Distribution", distribution.Name },
{ "IsUnrealEngine5", "true" },
+ { "Timestamp", DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString(CultureInfo.InvariantCulture) },
// Build options
{ $"ExecuteBuild", executeBuild ? "true" : "false" },
@@ -828,6 +829,7 @@ public BuildSpecification ProjectPathSpecToBuildSpec(
{ $"UProjectPath", $"__REPOSITORY_ROOT__/{Path.GetFileName(pathSpec.UProjectPath)}" },
{ $"Distribution", "None" },
{ "IsUnrealEngine5", "true" },
+ { "Timestamp", DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString(CultureInfo.InvariantCulture) },
// Build options
{ $"ExecuteBuild", "true" },