diff --git a/packages/core/src/Extension.ts b/packages/core/src/Extension.ts
index 0a7d6044..9289e812 100644
--- a/packages/core/src/Extension.ts
+++ b/packages/core/src/Extension.ts
@@ -113,18 +113,7 @@
 //   }
 // }
 
-export interface Extension {
-  type: string,
-  name: string,
-  options: {
-    [key: string]: any
-  },
-  createCommands(): {
-    [key: string]: any
-  },
-}
-
-export interface ExtensionSpec<Options, Commands> {
+export interface ExtensionSpec<Options = {}, Commands = {}> {
   name: string,
   defaultOptions?: Options,
   createCommands?(this: {
@@ -133,13 +122,18 @@ export interface ExtensionSpec<Options, Commands> {
   }): Commands,
 }
 
+export type Extension = Required<Omit<ExtensionSpec, 'defaultOptions'> & {
+  type: string,
+  options: {
+    [key: string]: any
+  },
+}>
+
 const defaultExtension: Extension = {
   type: 'extension',
   name: 'extension',
   options: {},
-  createCommands() {
-    return {}
-  },
+  createCommands: () => ({}),
 }
 
 export function createExtension<Options extends {}, Commands extends {}>(config: ExtensionSpec<Options, Commands>) {
diff --git a/packages/core/src/Node.ts b/packages/core/src/Node.ts
index 1db7f738..cafc6ddf 100644
--- a/packages/core/src/Node.ts
+++ b/packages/core/src/Node.ts
@@ -70,25 +70,9 @@
 // }
 
 import { DOMOutputSpec, NodeSpec, Node } from 'prosemirror-model'
-import { Extension, ExtensionSpec } from './Extension'
+import { ExtensionSpec } from './Extension'
 
-export interface NodeExtension extends Extension {
-  topNode: boolean,
-  content: NodeSpec['content'],
-  marks: NodeSpec['marks'],
-  group: NodeSpec['group'],
-  inline: NodeSpec['inline'],
-  atom: NodeSpec['atom'],
-  parseHTML: () => NodeSpec['parseDOM'],
-  renderHTML: (props: {
-    node: Node,
-    attributes: {
-      [key: string]: any,
-    },
-  }) => DOMOutputSpec,
-}
-
-export interface NodeExtensionSpec<Options, Commands> extends ExtensionSpec<Options, Commands> {
+export interface NodeExtensionSpec<Options = {}, Commands = {}> extends ExtensionSpec<Options, Commands> {
   topNode?: boolean,
   content?: NodeSpec['content'],
   marks?: NodeSpec['marks'],
@@ -104,6 +88,13 @@ export interface NodeExtensionSpec<Options, Commands> extends ExtensionSpec<Opti
   }) => DOMOutputSpec,
 }
 
+export type NodeExtension = Required<Omit<NodeExtensionSpec, 'defaultOptions'> & {
+  type: string,
+  options: {
+    [key: string]: any
+  },
+}>
+
 const defaultNode: NodeExtension = {
   type: 'node',
   name: 'node',
diff --git a/packages/core/src/utils/getSchema.ts b/packages/core/src/utils/getSchema.ts
index fb6cf6dd..49af44a0 100644
--- a/packages/core/src/utils/getSchema.ts
+++ b/packages/core/src/utils/getSchema.ts
@@ -5,13 +5,13 @@ import getTopNodeFromExtensions from './getTopNodeFromExtensions'
 import getNodesFromExtensions from './getNodesFromExtensions'
 import getMarksFromExtensions from './getMarksFromExtensions'
 import resolveExtensionConfig from './resolveExtensionConfig'
-import { Node } from '../Node'
+import { NodeExtension } from '../Node'
 import Mark from '../Mark'
 import Extension from '../Extension'
 
 export default function getSchema(extensions: Extensions): Schema {
   // const baseExtensions = extensions.filter(extension => extension.type === 'extension') as Extension[]
-  const nodeExtensions = extensions.filter(extension => extension.type === 'node') as Node[]
+  const nodeExtensions = extensions.filter(extension => extension.type === 'node') as NodeExtension[]
   // const markExtensions = extensions.filter(extension => extension.type === 'mark') as Mark[]
 
   // console.log({ extensions })