diff --git a/Cargo.toml b/Cargo.toml
index 3aecf73..70e745b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "urdf-rs"
-version = "0.8.0"
+version = "0.9.0"
 authors = ["Takashi Ogura <t.ogura@gmail.com>"]
 edition = "2021"
 description = "URDF parser"