diff --git a/src/LLink.ts b/src/LLink.ts
index 3037090324..ed40f670b7 100644
--- a/src/LLink.ts
+++ b/src/LLink.ts
@@ -20,6 +20,8 @@ export type SerialisedLLinkArray = [
   type: ISlotType,
 ]
 
+type BasicReadonlyNetwork = Pick<ReadonlyLinkNetwork, "getNodeById" | "links" | "floatingLinks">
+
 // this is the class in charge of storing link information
 export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
   /** Link ID */
@@ -162,7 +164,7 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
    * @param linkId The ID of the link to get the origin node of
    * @returns The origin node of the link, or `undefined` if the link is not found or the origin node is not found
    */
-  static getOriginNode(network: Pick<ReadonlyLinkNetwork, "getNodeById" | "links">, linkId: LinkId): LGraphNode | undefined {
+  static getOriginNode(network: BasicReadonlyNetwork, linkId: LinkId): LGraphNode | undefined {
     const id = network.links.get(linkId)?.origin_id
     return network.getNodeById(id) ?? undefined
   }
@@ -173,7 +175,7 @@ export class LLink implements LinkSegment, Serialisable<SerialisableLLink> {
    * @param linkId The ID of the link to get the target node of
    * @returns The target node of the link, or `undefined` if the link is not found or the target node is not found
    */
-  static getTargetNode(network: Pick<ReadonlyLinkNetwork, "getNodeById" | "links">, linkId: LinkId): LGraphNode | undefined {
+  static getTargetNode(network: BasicReadonlyNetwork, linkId: LinkId): LGraphNode | undefined {
     const id = network.links.get(linkId)?.target_id
     return network.getNodeById(id) ?? undefined
   }
diff --git a/src/types/serialisation.ts b/src/types/serialisation.ts
index ba00bb8f71..501ee5f826 100644
--- a/src/types/serialisation.ts
+++ b/src/types/serialisation.ts
@@ -40,7 +40,7 @@ export interface BaseExportedGraph {
   /** Definitions of re-usable objects that are referenced elsewhere in this exported graph. */
   definitions?: {
     /** The base definition of subgraphs used in this workflow. That is, what you see when you open / edit a subgraph. */
-    subgraphs?: Record<UUID, ExportedSubgraph>[]
+    subgraphs?: Record<UUID, ExportedSubgraph>
   }
 }
 
@@ -99,7 +99,7 @@ export interface ExportedSubgraphInstance extends NodeSubgraphSharedProps {
    * The ID of the actual subgraph definition.
    * @see {@link ExportedSubgraph.subgraphs}
    */
-  subgraphId: UUID
+  type: UUID
 }
 
 /**
@@ -123,7 +123,7 @@ export interface ISerialisedGraph extends BaseExportedGraph {
  * Defines a subgraph and its contents.
  * Can be referenced multiple times in a schema.
  */
-export interface ExportedSubgraph extends ISerialisedGraph {
+export interface ExportedSubgraph extends SerialisableGraph {
   /** The display name of the subgraph. */
   name: string
   /** Ordered list of inputs to the subgraph itself. Similar to a reroute, with the input side in the graph, and the output side in the subgraph. */