diff --git a/index.html b/index.html
index a4012d8..c84aa47 100644
--- a/index.html
+++ b/index.html
@@ -25,7 +25,7 @@
       </thead>
       <tbody>
         {{ range $index, $item := .Data.Todos }}
-          <tr {{ if $item.Done }}class="success"{{ end }}>
+          <tr {{ if $item.Done }}style="text-decoration: line-through;"{{ end }}>
             <td>
               {{ add $index 1 }}
             </td>
@@ -41,12 +41,21 @@
               </span>
             </td>
             <td>
-              <form action="/{{ $item.ID }}/done" method="post">
-                <button type="submit" class="btn btn-info btn-xs">
-                  <span class="glyphicon glyphicon-ok"></span>
-                  Done 
-                </button>
-              </form>
+              {{ if $item.Done }}
+                <form action="/{{ $item.ID }}/undone" method="post">
+                  <button type="submit" class="btn btn-info btn-xs">
+                    <span class="glyphicon glyphicon-eye-open"></span>
+                    Open 
+                  </button>
+                </form>
+              {{ else }}
+                <form action="/{{ $item.ID }}/done" method="post">
+                  <button type="submit" class="btn btn-info btn-xs">
+                    <span class="glyphicon glyphicon-eye-close"></span>
+                    Close
+                  </button>
+                </form>
+              {{ end }}
             </td>
             <td>
               <form action="/{{ $item.ID }}/delete" method="post">
diff --git a/main.go b/main.go
index e455d28..29613ef 100644
--- a/main.go
+++ b/main.go
@@ -39,6 +39,7 @@ func main() {
 	r.Methods("GET").Path("/logout").Handler(appHandler(LogoutHandler))
 	r.Methods("POST").Path("/{id}/delete").Handler(appHandler(DeleteHandler))
 	r.Methods("POST").Path("/{id}/done").Handler(appHandler(DoneHandler))
+	r.Methods("POST").Path("/{id}/undone").Handler(appHandler(UndoneHandler))
 	// add logging
 	rWithLogging := handlers.LoggingHandler(os.Stdout, r)
 	log.Fatal(http.ListenAndServe(":3000", rWithLogging))
@@ -188,3 +189,24 @@ func DoneHandler(w http.ResponseWriter, r *http.Request) *appError {
 	http.Redirect(w, r, "/", http.StatusSeeOther)
 	return nil
 }
+
+func UndoneHandler(w http.ResponseWriter, r *http.Request) *appError {
+	vars := mux.Vars(r)
+	id := vars["id"]
+	// get username from session
+	session, err := RediStore.Get(r, "session")
+	if err != nil {
+		return InternalServerError(fmt.Errorf("get session from redistore: %v", err))
+	}
+	username := session.Values["username"].(string)
+	t, err := db.GetTodoByID(username, id)
+	if err != nil {
+		return InternalServerError(fmt.Errorf("get todo by id: %v", err))
+	}
+	t.Done = false
+	if err := db.UpdateTodo(username, t); err != nil {
+		return InternalServerError(fmt.Errorf("update todo: %v", err))
+	}
+	http.Redirect(w, r, "/", http.StatusSeeOther)
+	return nil
+}