diff --git a/README.md b/README.md
index 0bf708a8..20abe88f 100644
--- a/README.md
+++ b/README.md
@@ -9,9 +9,10 @@ terminal ui (tui) frontend for git written in rust
 * [x] only show diff of selected file
 * [x] change detection
 * [x] allow scrolling diff
+* [x] support staging
 * [ ] show added files on working dir changes
 * [ ] allow selecting/diff index items
-* [ ] support staging/unstaging
+* [ ] support unstaging
 * [ ] support committing
 * [ ] polling in thread
 * [ ] support push/pull
diff --git a/src/app.rs b/src/app.rs
index c24b4d9d..66ba8939 100644
--- a/src/app.rs
+++ b/src/app.rs
@@ -160,7 +160,19 @@ impl App {
         self.fetch_status();
     }
 
-    fn index_add(&mut self) {}
+    fn index_add(&mut self) {
+        if let Some(i) = self.status_select {
+            let repo = git_utils::repo();
+
+            let mut index = repo.index().unwrap();
+
+            let path = Path::new(self.status.wt_items[i].path.as_str());
+            index.update_all(path, None).unwrap();
+            index.write().unwrap();
+
+            self.update();
+        }
+    }
 
     fn scroll(&mut self, inc: bool) {
         if inc {