diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
index 3a4f06b37d..506dea1bbe 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
@@ -131,17 +131,19 @@ private async Task<List<WorkflowDefinition>> IncludeConsumersAsync(List<Workflow
     private async Task WriteZipResponseAsync(List<WorkflowDefinition> definitions, CancellationToken cancellationToken)
     {
         var zipStream = new MemoryStream();
+        var sortedDefinitions = definitions.OrderBy(d => d.DefinitionId).ToList();
         
 #if NET10_0_OR_GREATER
         await using (var zipArchive = new ZipArchive(zipStream, ZipArchiveMode.Create, true))
         {
             // Create a JSON file for each workflow definition:
-            foreach (var definition in definitions)
+            foreach (var definition in sortedDefinitions)
             {
                 var model = await CreateWorkflowModelAsync(definition, cancellationToken);
                 var binaryJson = await SerializeWorkflowDefinitionAsync(model, cancellationToken);
                 var fileName = GetFileName(model);
                 var entry = zipArchive.CreateEntry(fileName, CompressionLevel.Optimal);
+                entry.LastWriteTime = DateTimeOffset.UnixEpoch;
                 await using var entryStream = await entry.OpenAsync(cancellationToken);
                 await entryStream.WriteAsync(binaryJson, cancellationToken);
             }
@@ -150,12 +152,13 @@ private async Task WriteZipResponseAsync(List<WorkflowDefinition> definitions, C
         using (var zipArchive = new ZipArchive(zipStream, ZipArchiveMode.Create, true))
         {
             // Create a JSON file for each workflow definition:
-            foreach (var definition in definitions)
+            foreach (var definition in sortedDefinitions)
             {
                 var model = await CreateWorkflowModelAsync(definition, cancellationToken);
                 var binaryJson = await SerializeWorkflowDefinitionAsync(model, cancellationToken);
                 var fileName = GetFileName(model);
                 var entry = zipArchive.CreateEntry(fileName, CompressionLevel.Optimal);
+                entry.LastWriteTime = DateTimeOffset.UnixEpoch;
                 await using var entryStream = entry.Open();
                 await entryStream.WriteAsync(binaryJson, cancellationToken);
             }
diff --git a/test/component/Elsa.Workflows.ComponentTests/Scenarios/WorkflowReferenceGraph/WorkflowReferenceGraphTests.cs b/test/component/Elsa.Workflows.ComponentTests/Scenarios/WorkflowReferenceGraph/WorkflowReferenceGraphTests.cs
index dd41beac2e..f37751ddd1 100644
--- a/test/component/Elsa.Workflows.ComponentTests/Scenarios/WorkflowReferenceGraph/WorkflowReferenceGraphTests.cs
+++ b/test/component/Elsa.Workflows.ComponentTests/Scenarios/WorkflowReferenceGraph/WorkflowReferenceGraphTests.cs
@@ -36,4 +36,16 @@ public async Task ConsumersEndpoint_LeafWorkflow_ReturnsEmpty()
         Assert.NotNull(response);
         Assert.Empty(response.ConsumingWorkflowDefinitionIds);
     }
+
+    [Fact(DisplayName = "Consumers endpoint for unknown workflow returns not found")]
+    public async Task ConsumersEndpoint_UnknownWorkflow_ReturnsNotFound()
+    {
+        var client = WorkflowServer.CreateApiClient<IWorkflowDefinitionsApi>();
+        const string unknownDefinitionId = "refgraph-unknown-definition";
+
+        var exception = await Assert.ThrowsAsync<Refit.ApiException>(async () =>
+            await client.GetConsumersAsync(unknownDefinitionId));
+
+        Assert.Equal(System.Net.HttpStatusCode.NotFound, exception.StatusCode);
+    }
 }