diff --git a/README.md b/README.md
index 537ada6..0149dbc 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@ In this project used:
 * react
 * create-react-app
 * react-transition-group, CSSTransition
+* formik
 
 Run this project locally! 
 Just do: