diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 814b0f6f..0d4113f4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@ default_language_version:
   python: python3
 repos:
   - repo: https://github.com/PSF/black
-    rev: 24.8.0
+    rev: 24.10.0
     hooks:
       - id: black
         args: [--safe, --quiet]
@@ -20,16 +20,16 @@ repos:
           - flake8-comprehensions
           - flake8-simplify
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.17.0
+    rev: v3.19.0
     hooks:
       - id: pyupgrade
         args: [--keep-runtime-typing]
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: 2.2.1
+    rev: v2.5.0
     hooks:
       - id: pyproject-fmt
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.11.2
+    rev: v1.13.0
     hooks:
       - id: mypy
         files: chanfig
@@ -46,7 +46,7 @@ repos:
       - id: prettier
         files: chanfig
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.6.0
+    rev: v5.0.0
     hooks:
       - id: check-added-large-files
       - id: check-ast
diff --git a/chanfig/flat_dict.py b/chanfig/flat_dict.py
index 023fdc4a..7e48399d 100644
--- a/chanfig/flat_dict.py
+++ b/chanfig/flat_dict.py
@@ -110,7 +110,7 @@ def to_dict(obj: Any, flatten: bool = False) -> Mapping | Sequence | Set:
     if isinstance(obj, Variable):
         return obj.value
     if is_dataclass(obj):
-        return asdict(obj)  # type: ignore[call-overload]
+        return asdict(obj)  # type: ignore[arg-type]
     if hasattr(obj, "to_dict"):
         return obj.to_dict()
     return obj
@@ -717,7 +717,10 @@ def interpolate(  # pylint: disable=R0912
                 self[key] = self.substitute(self[key], interpolators, value)
             if unsafe_eval and isinstance(self[key], str):
                 with suppress(SyntaxError):
-                    self[key] = eval(self[key])  # pylint: disable=W0123
+                    if isinstance(self[key], Variable):
+                        self[key].set(eval(self[key].value))
+                    else:
+                        self[key] = eval(self[key])  # pylint: disable=W0123
         return self
 
     @staticmethod
diff --git a/chanfig/parser.py b/chanfig/parser.py
index d458c0ac..8b223541 100644
--- a/chanfig/parser.py
+++ b/chanfig/parser.py
@@ -297,7 +297,7 @@ def add_config_argument(self, key, value: Any | None = None, dtype: type | None
             if isinstance(value, Variable):
                 dtype = value._type or value.dtype  # pylint: disable=W0212
             elif isinstance(value, Field):
-                dtype = value.type
+                dtype = value.type  # type: ignore[assignment]
             elif value is not None:
                 dtype = type(value)
         if _should_collect_from_parameters(dtype):
diff --git a/pyproject.toml b/pyproject.toml
index fbba6987..80e477c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Topic :: Scientific/Engineering :: Artificial Intelligence",
 ]
 dynamic = [