diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index a9cc00092..c92590c6f 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -23,7 +23,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Build changelog
         run: pip install yaml-changelog==0.3.0 && make changelog
       - name: Preview changelog update
@@ -41,7 +41,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Install package
         run: make install
       - name: Run tests
diff --git a/.github/workflows/push.yaml b/.github/workflows/push.yaml
index ac4d68f3d..2ed5452ae 100644
--- a/.github/workflows/push.yaml
+++ b/.github/workflows/push.yaml
@@ -30,7 +30,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Build changelog
         run: pip install yaml-changelog==0.3.0 && make changelog
       - name: Preview changelog update
@@ -56,7 +56,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Install package
         run: make install
       - name: Run tests
@@ -82,7 +82,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Publish a git tag
         run: ".github/publish-git-tag.sh || true"
       - name: Install package
@@ -112,7 +112,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.12
       - name: Install Wheel and Pytest
         run: pip3 install wheel setuptools pytest==5.4.3
       - name: Install package
diff --git a/changelog_entry.yaml b/changelog_entry.yaml
index e69de29bb..d3e15f5a7 100644
--- a/changelog_entry.yaml
+++ b/changelog_entry.yaml
@@ -0,0 +1,4 @@
+- bump: patch
+  changes:
+    fixed:
+    - Core version requirement update.
diff --git a/setup.py b/setup.py
index 37eae1550..5f25247a2 100644
--- a/setup.py
+++ b/setup.py
@@ -6,10 +6,9 @@
 this_directory = Path(__file__).parent
 long_description = (this_directory / "README.md").read_text()
 
-# Please make sure to cap all dependency versions, in order to avoid unwanted
-# functional and integration breaks caused by external code updates.
-
+# Core requirements with refined version constraints
 general_requirements = [
+    "policyengine_core>=3.14.1",
     "black[jupyter]",
     "coverage<7",
     "dpath<3",
@@ -20,8 +19,6 @@
     "numexpr<3",
     "pandas>=1.4.2,<2",
     "plotly>=5.6.0,<6",
-    "policyengine_core>=3.6.4",
-    "psutil<6",
     "pytest",
     "requests>=2.27.1,<3",
     "sortedcontainers<3",
@@ -50,10 +47,9 @@
         "License :: OSI Approved :: GNU Affero General Public License v3",
         "Operating System :: POSIX",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "Topic :: Scientific/Engineering :: Information Analysis",
     ],
     description="Microsimulation model for Canada's tax-benefit system.",
@@ -66,8 +62,7 @@
     extras_require={
         "dev": dev_requirements,
     },
-    # Windows CI requires Python 3.9.
-    python_requires=">=3.7",
+    python_requires=">=3.10,<3.13",
     install_requires=general_requirements,
     packages=find_packages(),
     include_package_data=True,