diff --git a/.github/workflows/calver.yml b/.github/workflows/calver.yml
new file mode 100644
index 0000000..552a571
--- /dev/null
+++ b/.github/workflows/calver.yml
@@ -0,0 +1,38 @@
+name: Build_Subgen_Dockerfile
+
+on:
+  push:
+    branches:
+      - 'main'
+    paths-ignore:
+      - '**.md'
+      - '**.yml'
+  workflow_dispatch:
+
+jobs:
+ 
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Set Calver Version
+        uses: Nelyx/action-calver@v1.0.0
+        id: setcalver
+        with:
+          default_branch: 'refs/heads/main'
+          format: 'YYYY.M.D'
+          version_prefix: ''
+      - name: Update version file
+        run: |
+          sed -i "s/subgen_version =.*/subgen_version = '${{ steps.setcalver.outputs.package_version }}'/" subgen/subgen.py
+      
+      - name: Commit and push changes
+        run: |
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "actions@github.com"
+          git add subgen/subgen.py
+          git commit -m "Automated update subgen.py with version"
+          git push