diff --git a/pyproject.toml b/pyproject.toml
index 717ea528..f39efc07 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,18 +12,16 @@ readme = "README.md"
 license = "MIT"
 license-files = [ "LICENSE" ]
 authors = [ { name = "The OpenFE developers", email = "openfe@omsf.io" } ]
-requires-python = ">=3.10"
+requires-python = ">=3.11,<3.14"
 
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Intended Audience :: Science/Research",
   "Operating System :: POSIX",
   "Programming Language :: Python :: 3 :: Only",
-  "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
-  "Programming Language :: Python :: 3.14",
   "Topic :: Scientific/Engineering :: Bio-Informatics",
   "Topic :: Scientific/Engineering :: Chemistry",
 ]