diff --git a/packages/core/index.ts b/packages/core/index.ts
index a7a539ea..415ed0e1 100644
--- a/packages/core/index.ts
+++ b/packages/core/index.ts
@@ -6,6 +6,7 @@ export { default as ComponentRenderer } from './src/ComponentRenderer'
 export { default as Extension } from './src/Extension'
 export { default as Node } from './src/Node'
 export { default as Mark } from './src/Mark'
+export { Extensions } from './src/types'
 
 export { default as markInputRule } from './src/inputRules/markInputRule'
 export { default as markPasteRule } from './src/pasteRules/markPasteRule'