diff --git a/.gitignore b/.gitignore
index 4b1f16b7..60cec3f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,5 +9,7 @@ docs/_build/
 **/*.h5
 **/iframe_figures/
 .idea
+.env
+.venv
 .vscode
 venv
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73539965..4a310ceb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,24 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.21.2] - 2024-05-08 08:44:48
+
+### Fixed
+
+- Generation of enum-typed variables
+
+## [2.21.1] - 2024-05-07 15:44:58
+
+### Fixed
+
+- Bug in macro caching logic.
+
+## [2.21.0] - 2024-05-07 12:16:05
+
+### Added
+
+- Ability to turn off read and write features in the macro cache.
+
 ## [2.20.0] - 2024-05-06 14:24:08
 
 ### Added
@@ -628,6 +646,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
+[2.21.2]: https://github.com/PolicyEngine/policyengine-core/compare/2.21.1...2.21.2
+[2.21.1]: https://github.com/PolicyEngine/policyengine-core/compare/2.21.0...2.21.1
+[2.21.0]: https://github.com/PolicyEngine/policyengine-core/compare/2.20.0...2.21.0
 [2.20.0]: https://github.com/PolicyEngine/policyengine-core/compare/2.19.2...2.20.0
 [2.19.2]: https://github.com/PolicyEngine/policyengine-core/compare/2.19.1...2.19.2
 [2.19.1]: https://github.com/PolicyEngine/policyengine-core/compare/2.19.0...2.19.1
diff --git a/changelog.yaml b/changelog.yaml
index c06fbbf1..ce602b80 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -524,3 +524,18 @@
     fixed:
     - Uprating bugs.
   date: 2024-05-06 14:24:08
+- bump: minor
+  changes:
+    added:
+    - Ability to turn off read and write features in the macro cache.
+  date: 2024-05-07 12:16:05
+- bump: patch
+  changes:
+    fixed:
+    - Bug in macro caching logic.
+  date: 2024-05-07 15:44:58
+- bump: patch
+  changes:
+    fixed:
+    - Generation of enum-typed variables
+  date: 2024-05-08 08:44:48
diff --git a/policyengine_core/enums/enum.py b/policyengine_core/enums/enum.py
index dcad5c6b..584b1bd4 100644
--- a/policyengine_core/enums/enum.py
+++ b/policyengine_core/enums/enum.py
@@ -49,17 +49,18 @@ def encode(cls, array: Union[EnumArray, np.ndarray]) -> EnumArray:
         if isinstance(array, EnumArray):
             return array
 
-        if array.dtype.kind == "b":
+        # if array.dtype.kind == "b":
+        if isinstance(array == 0, bool):
             # Convert boolean array to string array
             array = array.astype(str)
 
-        if array.dtype.kind in {"U", "S"}:
+        if isinstance(array, np.ndarray) and array.dtype.kind in {"U", "S"}:
             # String array
             indices = np.select(
                 [array == item.name for item in cls],
                 [item.index for item in cls],
             )
-        elif array.dtype.kind == "O":
+        elif isinstance(array, np.ndarray) and array.dtype.kind == "O":
             # Enum items array
             if len(array) > 0:
                 first_item = array[0]
diff --git a/policyengine_core/parameters/parameter.py b/policyengine_core/parameters/parameter.py
index 57d04b43..da185e18 100644
--- a/policyengine_core/parameters/parameter.py
+++ b/policyengine_core/parameters/parameter.py
@@ -210,6 +210,8 @@ def update(self, period=None, start=None, stop=None, value=None):
 
         self.parent.clear_parent_cache()
 
+        self.mark_as_modified()
+
     def mark_as_modified(self):
         self.modified = True
         self.parent.mark_as_modified()
diff --git a/policyengine_core/simulations/simulation.py b/policyengine_core/simulations/simulation.py
index e6dbed5d..b158a60f 100644
--- a/policyengine_core/simulations/simulation.py
+++ b/policyengine_core/simulations/simulation.py
@@ -69,6 +69,12 @@ class Simulation:
     is_over_dataset: bool = False
     """Whether this simulation is built over a dataset."""
 
+    macro_cache_read: bool = True
+    """Whether to read from the macro cache."""
+
+    macro_cache_write: bool = True
+    """Whether to write to the macro cache."""
+
     def __init__(
         self,
         tax_benefit_system: "TaxBenefitSystem" = None,
@@ -1367,6 +1373,8 @@ def _get_macro_cache_value(
         """
         Get the value of a variable from a cache file.
         """
+        if not self.macro_cache_read:
+            return None
         with h5py.File(cache_file_path, "r") as f:
             return f["values"][()]
 
@@ -1378,6 +1386,8 @@ def _set_macro_cache_value(
         """
         Set the value of a variable in a cache file.
         """
+        if not self.macro_cache_write:
+            return None
         with h5py.File(cache_file_path, "w") as f:
             f.create_dataset("values", data=value)
 
diff --git a/setup.py b/setup.py
index 87420399..c099ea91 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@
 
 setup(
     name="policyengine-core",
-    version="2.20.0",
+    version="2.21.2",
     author="PolicyEngine",
     author_email="hello@policyengine.org",
     classifiers=[