diff --git a/CHANGELOG.md b/CHANGELOG.md
index b21f618d2..7ead9b6d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Wrong use of `tolerance` argument in constraints user guide
 - Errors with generics and type aliases in documentation
 - Deduplication bug in substance_data hypothesis strategy
+- Parameter classes are now slotted due to `cached_property` attrs support
 
 ### Removed
 - Conda install instructions and version badge
diff --git a/baybe/parameters/base.py b/baybe/parameters/base.py
index c795b5812..19d5d50af 100644
--- a/baybe/parameters/base.py
+++ b/baybe/parameters/base.py
@@ -13,11 +13,8 @@
 from baybe.utils import SerialMixin, get_base_structure_hook, unstructure_base
 from baybe.utils.serialization import converter
 
-# TODO: Reactive slots in all classes once cached_property is supported:
-#   https://github.com/python-attrs/attrs/issues/164
 
-
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class Parameter(ABC, SerialMixin):
     """Abstract base class for all parameters.
 
@@ -48,12 +45,10 @@ def is_in_range(self, item: Any) -> bool:
         """
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class DiscreteParameter(Parameter, ABC):
     """Abstract class for discrete parameters."""
 
-    # TODO [15280]: needs to be refactored
-
     # class variables
     is_discrete: ClassVar[bool] = True
     # See base class.
diff --git a/baybe/parameters/categorical.py b/baybe/parameters/categorical.py
index 8992ae27e..88c5d782d 100644
--- a/baybe/parameters/categorical.py
+++ b/baybe/parameters/categorical.py
@@ -13,7 +13,7 @@
 from baybe.parameters.validation import validate_unique_values
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class CategoricalParameter(DiscreteParameter):
     """Parameter class for categorical parameters."""
 
@@ -55,7 +55,7 @@ def comp_df(self) -> pd.DataFrame:  # noqa: D102
         return comp_df
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class TaskParameter(CategoricalParameter):
     """Parameter class for task parameters."""
 
diff --git a/baybe/parameters/custom.py b/baybe/parameters/custom.py
index 03fc6c92a..2352f99fb 100644
--- a/baybe/parameters/custom.py
+++ b/baybe/parameters/custom.py
@@ -14,7 +14,7 @@
 from baybe.utils import df_uncorrelated_features, eq_dataframe
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class CustomDiscreteParameter(DiscreteParameter):
     """Custom parameters.
 
diff --git a/baybe/parameters/numerical.py b/baybe/parameters/numerical.py
index 867a80d03..f7d2ae845 100644
--- a/baybe/parameters/numerical.py
+++ b/baybe/parameters/numerical.py
@@ -15,7 +15,7 @@
 from baybe.utils import DTypeFloatNumpy, InfiniteIntervalError, Interval, convert_bounds
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class NumericalDiscreteParameter(DiscreteParameter):
     """Parameter class for discrete numerical parameters (a.k.a. setpoints)."""
 
@@ -94,7 +94,7 @@ def is_in_range(self, item: float) -> bool:  # noqa: D102
         return any(differences_acceptable)
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class NumericalContinuousParameter(Parameter):
     """Parameter class for continuous numerical parameters."""
 
diff --git a/baybe/parameters/substance.py b/baybe/parameters/substance.py
index abd77c005..88508504a 100644
--- a/baybe/parameters/substance.py
+++ b/baybe/parameters/substance.py
@@ -39,7 +39,7 @@
 """Type alias for SMILES strings."""
 
 
-@define(frozen=True, slots=False)
+@define(frozen=True)
 class SubstanceParameter(DiscreteParameter):
     """Generic substances that are treated with cheminformatics descriptors.
 
diff --git a/pyproject.toml b/pyproject.toml
index 642f43457..a87371c03 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ keywords = [
 ]
 dynamic = ['version']
 dependencies = [
-    "attrs>=22.2.0",
+    "attrs>=24.1.0",
     "botorch>=0.8.1",
     "cattrs>=23.2.0",
     "exceptiongroup",