diff --git a/pyproject.toml b/pyproject.toml
index 5530e8d..7a411e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,8 +9,7 @@ classifiers = [
   "Intended Audience :: Developers",
   "Natural Language :: English",
   "Programming Language :: Python :: 3",
-  "Programming Language :: Python :: 3.12",
-  "Programming Language :: Python :: 3.13"
+  "Programming Language :: Python :: 3.12"
 ]
 dependencies = [
   "f90nml>=1.1.0",
@@ -23,7 +22,7 @@ license = "Apache-2.0"
 license-files = ["LICENSE.md"]
 name = "pyshield"
 readme = "README.md"
-requires-python = ">=3.12, <3.14"
+requires-python = ">=3.12, <3.13"
 version = "0.2.0"
 
 [project.optional-dependencies]
@@ -54,7 +53,7 @@ Repository = "https://github.com/NOAA-GFDL/PySHiELD"
 [tool.aliases]
 
 [tool.black]
-target-version = ["py312", "py313"]
+target-version = ["py312"]
 
 [tool.coverage.run]
 branch = true