diff --git a/nireports/assembler/data/__init__.py b/nireports/assembler/data/__init__.py
index 8d5cfbf4..b0cba440 100644
--- a/nireports/assembler/data/__init__.py
+++ b/nireports/assembler/data/__init__.py
@@ -11,4 +11,4 @@
 
 from acres import Loader
 
-load = Loader(__package__)
+load = Loader(__spec__.name)
diff --git a/pyproject.toml b/pyproject.toml
index a8952048..b132bccc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,11 +16,12 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 license = "Apache-2.0"
 requires-python = ">=3.9"
 dependencies = [
-    "acres",
+    "acres >= 0.2",
     "importlib_resources >= 5.12; python_version < '3.12'",
     "matplotlib >= 3.5",
     "nibabel >= 3.0.1",