diff --git a/CHANGELOG.md b/CHANGELOG.md
index 993006f8..7d8e9135 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+<a name="13.0.1"></a>
+
+# 13.0.1 (2021-11-20)
+
+- **Fix** export internal interfaces (issue [#307](https://github.com/angular-split/angular-split/issues/307)).
+
 <a name="13.0.0"></a>
 
 # 13.0.0 (2021-11-20)
diff --git a/projects/angular-split/package.json b/projects/angular-split/package.json
index 5ffd601f..80bad5d9 100644
--- a/projects/angular-split/package.json
+++ b/projects/angular-split/package.json
@@ -1,6 +1,6 @@
 {
   "name": "angular-split",
-  "version": "13.0.0",
+  "version": "13.0.1",
   "description": "Angular UI library to split views and allow dragging to resize areas using CSS flexbox layout.",
   "author": "bertrandg",
   "repository": {
diff --git a/projects/angular-split/src/public_api.ts b/projects/angular-split/src/public_api.ts
index 81a09e09..07393a3e 100644
--- a/projects/angular-split/src/public_api.ts
+++ b/projects/angular-split/src/public_api.ts
@@ -5,4 +5,4 @@
 export { AngularSplitModule } from './lib/module'
 export { SplitComponent } from './lib/component/split.component'
 export { SplitAreaDirective } from './lib/directive/split-area.directive'
-export { IOutputData, IOutputAreaSizes } from './lib/interface'
+export * from './lib/interface'