diff --git a/nortech/derivers/values/physical_units.py b/nortech/derivers/values/physical_units.py
index 76a2aef..ff42899 100644
--- a/nortech/derivers/values/physical_units.py
+++ b/nortech/derivers/values/physical_units.py
@@ -644,3 +644,25 @@
 )
 
 # This list can be further extended with more quantities and units as needed.
+# Boolean values can occur, just as dimensionless values:
+
+dimensionless = PhysicalQuantity(
+    name="Dimensionless",
+    description="A dimensionless quantity is a quantity that has no units.",
+    SIUnit=str(unit_registry.dimensionless),
+    SIUnitSymbol=f"{unit_registry.dimensionless:~}",
+)
+
+boolean = PhysicalUnit(
+    name="Boolean",
+    description="Boolean is a physical quantity that represents a binary value of true or false.",
+    symbol=f"{unit_registry.dimensionless:~}",
+    physicalQuantity=dimensionless,
+)
+
+dimensionless_unit = PhysicalUnit(
+    name=str(unit_registry.dimensionless),
+    description="The dimensionless unit is a unit of measurement that has no units.",
+    symbol=f"{unit_registry.dimensionless:~}",
+    physicalQuantity=dimensionless,
+)
diff --git a/nortech/gateways/nortech_api.py b/nortech/gateways/nortech_api.py
index 569f5d8..c85d793 100644
--- a/nortech/gateways/nortech_api.py
+++ b/nortech/gateways/nortech_api.py
@@ -16,7 +16,7 @@ class NortechAPISettings(BaseSettings):
 
     URL: str = Field(default="https://api.apps.nor.tech")
     KEY: str = Field(default=...)
-    USER_AGENT: str = Field(default="nortech-python/0.9.3")
+    USER_AGENT: str = Field(default="nortech-python/0.9.4")
     IGNORE_PAGINATION: bool = True
     EXPERIMENTAL_FEATURES: bool = False
     TIMEOUT: float | Timeout = Field(default=Timeout(connect=10, read=60))
diff --git a/pyproject.toml b/pyproject.toml
index 30a6844..2858462 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "nortech"
-version = "0.9.3"
+version = "0.9.4"
 description = "The official Python library for Nortech AI"
 authors = [
     { name = "Nortech AI", email = "info@nortech.ai" }