diff --git a/Cargo.toml b/Cargo.toml
index 7a77d58..19b8136 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "eval"
-version = "0.4.0"
+version = "0.4.1"
 description = "Expression evaluator"
 keywords = ["expression", "evaluate", "evaluator", "expr", "template"]
 authors = ["fengcen <fengcen.love@gmail.com>"]
diff --git a/README.md b/README.md
index 974714a..dad688d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ eval
 ====
 
 [![Project Status: Active - The project has reached a stable, usable state and is being actively developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)
-[![docs](https://docs.rs/eval/badge.svg?version=0.4.0 "docs")](https://docs.rs/eval)
+[![docs](https://docs.rs/eval/badge.svg?version=0.4.1 "docs")](https://docs.rs/eval)
 
 Eval is a powerful expression evaluator.