1 files changed, 2 insertions, 0 deletions

diff --git a/docs/io.md b/docs/io.md
index dd5aff0..e48d479 100644
--- a/docs/io.md
+++ b/docs/io.md
@@ -1,5 +1,7 @@
 # io 
 
+> out of date!!
+
 ## common 
 
 ### pprint