diff --git a/src/index.ts b/src/index.ts
index 459e78d..2a98df0 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -116,3 +116,4 @@ const empackEnvMetaPlugin: JupyterLiteServerPlugin<IEmpackEnvMetaFile> = {
 plugins.push(empackEnvMetaPlugin);
 
 export default plugins;
+export { IEmpackEnvMetaFile };