diff --git a/README.md b/README.md
index 6b678ff..4b26eb7 100644
--- a/README.md
+++ b/README.md
@@ -104,7 +104,7 @@ parts you need.
 ```
 # Cargo.toml
 [dependencies]
-xxcalc = "0.2.0"
+xxcalc = "0.2.1"
 ```
 
 ```rust