diff --git a/docs/todo/cryptonite-deprecated.txt b/docs/todo/cryptonite-deprecated.txt
new file mode 100644
index 00000000..9490f01d
--- /dev/null
+++ b/docs/todo/cryptonite-deprecated.txt
@@ -0,0 +1,4 @@
+TODO: move-to-crypton
+  cryptonite depracated.
+
+  Переехать на crypton ASAP.