diff --git a/.gitignore b/.gitignore
index 13e1e34d..f2935fd3 100755
--- a/.gitignore
+++ b/.gitignore
@@ -11,7 +11,7 @@ work/*
 .pytest_cache/*
 docs/source/_build
 docs/build
-.venv
+.venv*
 dist
 *~
 .python-version
diff --git a/pyproject.toml b/pyproject.toml
index f1cb99d9..4601b465 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,25 @@ authors = ["Christopher Villalobos <cvillalobos@ufl.edu>"]
 license = "BSD-3-Clause"
 
 [tool.poetry.dependencies]
-python = "^3.8"
-Fiona = "^1.9"
+python = ">=3.8,<4.0"
+
+numpy = [
+  {version = "^1.16", python = "<3.12"},
+  {version = "^2.4",  python = ">=3.12"}
+]
+
+Fiona = [
+  {version = "^1.9",  python = "<3.12"},
+  {version = "^1.10", python = ">=3.12"}
+]
+
+rasterio = [
+  {version = "^1.0",  python = "<3.12"},
+  {version = "^1.5",  python = ">=3.12"}
+]
+
 jinja2 = "^3.0"
-numpy = "^1.16"
-rasterio = "^1.0"
-rtree = "^0.8"
+rtree  = "^0.8"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.1"
@@ -32,4 +45,4 @@ black = "^22.8.0"
 
 [build-system]
 requires = ["setuptools", "poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+build-backend = "poetry.core.masonry.api"
\ No newline at end of file
diff --git a/pythia/io.py b/pythia/io.py
index ace368b9..4dc67513 100644
--- a/pythia/io.py
+++ b/pythia/io.py
@@ -4,7 +4,12 @@
 import fiona
 import numpy.ma as ma
 import rasterio
-from functools import cache
+
+try:
+    from functools import cache
+except ImportError:
+    from functools import lru_cache as cache
+
 from typing import Any, Dict, Tuple
 from pythia.gis import euclidean_distance