diff --git a/Cargo.toml b/Cargo.toml
index e91f09d..b2f754c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ name = "rust_ob"
 description = "an orderbook library for rust"
 readme = "README.md"
 keywords = ["financial", "orderbook"]
-version = "2.1.2"
+version = "2.1.3"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/toyota-corolla0/rust_ob"