diff --git a/cookiecutter.json b/cookiecutter.json
index 505d983..ca35864 100644
--- a/cookiecutter.json
+++ b/cookiecutter.json
@@ -13,8 +13,8 @@
   "package_dir_name": "diffpy.apps",
   "project_short_description": "User applications to help with tasks using diffpy packages",
   "project_keywords": "diffraction, PDF, X-ray, neutron",
-  "minimum_supported_python_version": "3.12",
-  "maximum_supported_python_version": "3.14",
+  "minimum_supported_python_version": "3.11",
+  "maximum_supported_python_version": "3.13",
   "project_needs_c_code_compiled": "No",
   "project_has_gui_tests": "No"
 }
diff --git a/news/downgrade.rst b/news/downgrade.rst
new file mode 100644
index 0000000..e896f95
--- /dev/null
+++ b/news/downgrade.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* No news added: Downgrade the required python version.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>
diff --git a/pyproject.toml b/pyproject.toml
index ab1a4f5..16303dc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,9 +25,9 @@ classifiers = [
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX',
         'Operating System :: Unix',
+        'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: 3.13',
-        'Programming Language :: Python :: 3.14',
         'Topic :: Scientific/Engineering :: Physics',
         'Topic :: Scientific/Engineering :: Chemistry',
 ]
diff --git a/requirements/conda.txt b/requirements/conda.txt
index 9a93f82..38287db 100644
--- a/requirements/conda.txt
+++ b/requirements/conda.txt
@@ -8,5 +8,3 @@ diffpy.srreal
 diffpy.structure
 networkx
 mcp[cli]
-mp-api
-pymatgen
diff --git a/requirements/pip.txt b/requirements/pip.txt
index 24ce15a..e69de29 100644
--- a/requirements/pip.txt
+++ b/requirements/pip.txt
@@ -1 +0,0 @@
-numpy