diff --git a/Cargo.toml b/Cargo.toml
index 8ed0a48..36b856e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rlua_serde"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["zrkn <zrkn@email.su>"]
 description = "Serde (De)serializer implementation for rlua Value"
 repository = "https://github.com/zrkn/rlua_serde/"
diff --git a/README.md b/README.md
index ca39b74..76766db 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ To use `rlua_serde`, first add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-rlua_serde = "0.3"
+rlua_serde = "0.4"
 ```
 
 Next, you can use `to_value`/`from_value` functions to serialize/deserialize: