diff --git a/src/common/ApiSpecification.cs b/src/common/ApiSpecification.cs
index 70066559..bd61e567 100644
--- a/src/common/ApiSpecification.cs
+++ b/src/common/ApiSpecification.cs
@@ -20,7 +20,7 @@ namespace common;
 public delegate ValueTask<Option<(ApiSpecification Specification, BinaryData Contents)>> GetApiSpecificationFromApim(ResourceKey resourceKey, JsonObject dto, CancellationToken cancellationToken);
 public delegate ValueTask<Option<(ApiSpecification Specification, BinaryData Contents)>> GetApiSpecificationFromFile(ResourceKey resourceKey, ReadFile readFile, CancellationToken cancellationToken);
 public delegate ValueTask WriteApiSpecificationFile(ResourceKey resourceKey, ApiSpecification specification, BinaryData contents, CancellationToken cancellationToken);
-public delegate ValueTask PutApiSpecificationInApim(ResourceKey resourceKey, ApiSpecification specification, BinaryData contents, CancellationToken cancellationToken);
+public delegate ValueTask PutApiSpecificationInApim(ResourceKey resourceKey, JsonObject baseDto, ApiSpecification specification, BinaryData contents, CancellationToken cancellationToken);
 
 public abstract record ApiSpecification
 {
@@ -547,7 +547,7 @@ private static PutApiSpecificationInApim ResolvePutApiSpecificationInApim(IServi
         var resource = ApiResource.Instance;
         var ancestors = ParentChain.Empty;
 
-        return async (resourceKey, specification, contents, cancellationToken) =>
+        return async (resourceKey, baseDto, specification, contents, cancellationToken) =>
         {
             if (resourceKey.Resource is not ApiResource and not WorkspaceApiResource)
             {
@@ -556,7 +556,7 @@ private static PutApiSpecificationInApim ResolvePutApiSpecificationInApim(IServi
 
             await (specification switch
             {
-                ApiSpecification.OpenApi openApiSpecification => putOpenApiSpecification(resourceKey, openApiSpecification, contents, cancellationToken),
+                ApiSpecification.OpenApi openApiSpecification => putOpenApiSpecification(resourceKey, baseDto, openApiSpecification, contents, cancellationToken),
                 ApiSpecification.Wadl wadlSpecification => putWadlSpecification(resourceKey, wadlSpecification, contents, cancellationToken),
                 ApiSpecification.Wsdl wsdlSpecification => putWsdlSpecification(resourceKey, wsdlSpecification, contents, cancellationToken),
                 ApiSpecification.GraphQl graphQlSpecification => putGraphQlSpecification(resourceKey, graphQlSpecification, contents, cancellationToken),
@@ -564,10 +564,9 @@ private static PutApiSpecificationInApim ResolvePutApiSpecificationInApim(IServi
             });
         };
 
-        async ValueTask putOpenApiSpecification(ResourceKey resourceKey, ApiSpecification.OpenApi specification, BinaryData contents, CancellationToken cancellationToken)
+        async ValueTask putOpenApiSpecification(ResourceKey resourceKey, JsonObject baseDto, ApiSpecification.OpenApi specification, BinaryData contents, CancellationToken cancellationToken)
         {
-            var resource = (IResourceWithDto)resourceKey.Resource;
-            var dto = await getDto(resource, resourceKey.Name, resourceKey.Parents, cancellationToken);
+            var dto = baseDto.DeepClone().AsObject();
 
             dto = dto.MergeWith(new JsonObject
             {
diff --git a/src/integration.tests/Apim.cs b/src/integration.tests/Apim.cs
index c00d66b2..adb850d5 100644
--- a/src/integration.tests/Apim.cs
+++ b/src/integration.tests/Apim.cs
@@ -231,7 +231,7 @@ async ValueTask putResourceGroup(IGrouping<IResource, ITestModel> group, Cancell
                              await specificationOption.IterTask(async tuple =>
                              {
                                  var (specification, contents) = tuple;
-                                 await putApiSpecification(model.Key, specification, contents, cancellationToken);
+                                 await putApiSpecification(model.Key, model.ToDto(), specification, contents, cancellationToken);
                              });
                          }, maxDegreeOfParallelism: Option.None, cancellationToken), cancellationToken),
                 IResourceWithDto resourceWithDto =>
@@ -244,4 +244,4 @@ await specificationOption.IterTask(async tuple =>
             });
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/publisher.tests/Api.cs b/src/publisher.tests/Api.cs
index dd37012e..9319f6e8 100644
--- a/src/publisher.tests/Api.cs
+++ b/src/publisher.tests/Api.cs
@@ -254,7 +254,7 @@ from specificationContents in Gen.Select(Generator.ApiSpecification, Generator.B
                     await ValueTask.CompletedTask;
                     return specificationContents;
                 },
-                PutApiSpecificationInApim = async (_, _, _, _) =>
+                PutApiSpecificationInApim = async (_, _, _, _, _) =>
                 {
                     await ValueTask.CompletedTask;
                 }
@@ -435,4 +435,4 @@ from dtoOption in Generator.JsonObject.OptionOf()
                 }
             };
     }
-}
\ No newline at end of file
+}
diff --git a/src/publisher.tests/WorkspaceApi.cs b/src/publisher.tests/WorkspaceApi.cs
index 47b0fd50..4928ee2c 100644
--- a/src/publisher.tests/WorkspaceApi.cs
+++ b/src/publisher.tests/WorkspaceApi.cs
@@ -251,7 +251,7 @@ from specificationContents in Gen.Select(Generator.ApiSpecification, Generator.B
                     await ValueTask.CompletedTask;
                     return specificationContents;
                 },
-                PutApiSpecificationInApim = async (_, _, _, _) =>
+                PutApiSpecificationInApim = async (_, _, _, _, _) =>
                 {
                     await ValueTask.CompletedTask;
                 }
@@ -429,4 +429,4 @@ from dtoOption in Generator.JsonObject.OptionOf()
                 }
             };
     }
-}
\ No newline at end of file
+}
diff --git a/src/publisher/Api.cs b/src/publisher/Api.cs
index efbe2911..3a125576 100644
--- a/src/publisher/Api.cs
+++ b/src/publisher/Api.cs
@@ -58,7 +58,7 @@ async ValueTask putApi(ResourceName name, JsonObject dto, CancellationToken canc
 
             await putResourceInApim(resource, name, dto, parents, cancellationToken);
 
-            await putSpecification(name, cancellationToken);
+            await putSpecification(name, dto, cancellationToken);
         }
 
 
@@ -128,14 +128,14 @@ async ValueTask makeApiCurrent(ResourceName name, CancellationToken cancellation
             await deleteResourceFromApim(releaseResourceKey, ignoreNotFound: true, waitForCompletion: true, cancellationToken);
         }
 
-        async ValueTask putSpecification(ResourceName name, CancellationToken cancellationToken)
+        async ValueTask putSpecification(ResourceName name, JsonObject dto, CancellationToken cancellationToken)
         {
             var resourceKey = ResourceKey.From(resource, name, parents);
             var fileOperations = getCurrentFileOperations();
 
             var specificationOption = await getSpecification(resourceKey, fileOperations.ReadFile, cancellationToken);
 
-            await specificationOption.IterTask(async specification => await putSpecificationInApim(resourceKey, specification.Specification, specification.Contents, cancellationToken));
+            await specificationOption.IterTask(async specification => await putSpecificationInApim(resourceKey, dto, specification.Specification, specification.Contents, cancellationToken));
         }
     }
 
@@ -251,7 +251,7 @@ internal static PutWorkspaceApi ResolvePutWorkspaceApi(IServiceProvider provider
 
             await putResourceInApim(resource, name, dto, parents, cancellationToken);
 
-            await putSpecification(resourceKey, cancellationToken);
+            await putSpecification(resourceKey, dto, cancellationToken);
         };
 
         async ValueTask setCurrentRevision(ResourceKey resourceKey, JsonObject dto, CancellationToken cancellationToken)
@@ -294,14 +294,14 @@ async ValueTask<int> getApimRevision(ResourceKey resourceKey, CancellationToken
             return GetWorkspaceApiRevisionFromDto(dtoJson);
         }
 
-        async ValueTask putSpecification(ResourceKey resourceKey, CancellationToken cancellationToken)
+        async ValueTask putSpecification(ResourceKey resourceKey, JsonObject dto, CancellationToken cancellationToken)
         {
             var fileOperations = getCurrentFileOperations();
 
             var specificationOption = await getSpecification(resourceKey, fileOperations.ReadFile, cancellationToken);
 
             await specificationOption.IterTask(async specification =>
-                await putSpecificationInApim(resourceKey, specification.Specification, specification.Contents, cancellationToken));
+                await putSpecificationInApim(resourceKey, dto, specification.Specification, specification.Contents, cancellationToken));
         }
 
         async ValueTask makeApiCurrent(ParentChain parents, ResourceName revisionedName, CancellationToken cancellationToken)
@@ -402,4 +402,4 @@ async ValueTask<Option<int>> getCurrentRevision(ResourceKey resourceKey, Cancell
             })).WithCancellation(cancellationToken);
         }
     }
-}
\ No newline at end of file
+}