diff --git a/Cargo.toml b/Cargo.toml
index 2f7df8f..a7babf4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "exmex"
-version = "0.8.0"  # check html document root in lib.rs and the Readme.md
+version = "0.8.1"  # check html document root in lib.rs and the Readme.md
 authors = ["Behrang Shafei <https://github.com/bertiqwerty>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"
diff --git a/Readme.md b/Readme.md
index 089df36..de439f6 100644
--- a/Readme.md
+++ b/Readme.md
@@ -13,7 +13,7 @@ Add
 ```
 [dependencies]
 # ...
-exmex = "0.8.0"
+exmex = "0.8.1"
 ```
 to your `Cargo.toml`.
 
diff --git a/src/lib.rs b/src/lib.rs
index 8b1d0b0..34cba8c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/exmex/0.8.0")]
+#![doc(html_root_url = "https://docs.rs/exmex/0.8.1")]
 //! Exmex is a fast, simple, and **ex**tendable **m**athematical **ex**pression evaluator.  
 //! ```rust
 //! # use std::error::Error;