diff --git a/.github/workflows/update-version.yml b/.github/workflows/update-version.yml
new file mode 100644
index 00000000..182305ae
--- /dev/null
+++ b/.github/workflows/update-version.yml
@@ -0,0 +1,51 @@
+name: Update Version File
+
+on:
+  push:
+    paths:
+      - "pyproject.toml"
+    branches:
+      - master
+
+jobs:
+  update-version:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+
+      - name: Update version.py
+        run: |
+          # Read version from pyproject.toml and update version.py
+          python -c '
+          import tomllib
+
+          # Read version from pyproject.toml
+          with open("pyproject.toml", "rb") as f:
+              config = tomllib.load(f)
+              version = config["project"]["version"]
+
+          # Write version to version.py
+          with open("version.py", "w") as f:
+              f.write("# This file is automatically generated by the build process when version is\n")
+              f.write("# updated in pyproject.toml.\n")
+              f.write(f"__version__ = \"{version}\"\n")
+          '
+
+      - name: Commit changes
+        run: |
+          git config --local user.name "github-actions"
+          git config --local user.email "github-actions@github.com"
+          git add version.py
+          git diff --quiet && git diff --staged --quiet || git commit -m "chore: Update version.py to match pyproject.toml"
+          git push
diff --git a/version.py b/version.py
index 7cccc753..4bb44b4a 100644
--- a/version.py
+++ b/version.py
@@ -1,3 +1,3 @@
 # This file is automatically generated by the build process when version is
 # updated in pyproject.toml.
-__version__ = "0.3.10"
+__version__ = "0.3.9"