1 files changed, 3 insertions, 3 deletions

diff --git a/README.md b/README.md
index 9d7e70e..56f3496 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,9 @@
     - [x] os (~~`os.setlocale()`~~)
     - [ ] Package
     - [ ] io
-        - [ ] `io.stdin`
-        - [ ] `io.stdout`
-        - [ ] `io.stderr`
+        - [x] `io.stdin`
+        - [x] `io.stdout`
+        - [x] `io.stderr`
         - [ ] `io.flush()`
         - [ ] `io.input()`
         - [ ] `io.lines()`