diff --git a/Cargo.toml b/Cargo.toml
index 755917c..0f548e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.3.8"
+version = "0.3.9"
 edition = "2021"
 repository = "https://git.bfpower.io/BFPOWER/physical"
 readme = "README.md"
diff --git a/src/quantity/irradiance.rs b/src/quantity/irradiance.rs
index f656d31..e40c729 100644
--- a/src/quantity/irradiance.rs
+++ b/src/quantity/irradiance.rs
@@ -1,5 +1,5 @@
 use crate::quantity::{Quantity, Value};
 use generate_quantity::quantity_type;
 
-//----- Watter per Square Meter ----------------------------------
+//----- Watts per Square Meter ----------------------------------
 quantity_type! {WattsPerSquareMeter, "W/m²"}
diff --git a/src/quantity/pressure.rs b/src/quantity/pressure.rs
new file mode 100644
index 0000000..abf1047
--- /dev/null
+++ b/src/quantity/pressure.rs
@@ -0,0 +1,5 @@
+use crate::quantity::{Quantity, Value};
+use generate_quantity::quantity_type;
+
+//----- Kilopascal ----------------------------------
+quantity_type! {KiloPascal, "kPa"}