diff --git a/.github/workflows/continous_integration.yml b/.github/workflows/continous_integration.yml
index b0f8271e..cc518763 100644
--- a/.github/workflows/continous_integration.yml
+++ b/.github/workflows/continous_integration.yml
@@ -4,9 +4,13 @@ name: CI
 
 # Controls when the action will run. 
 on:
-  # Triggers the workflow on push or pull request events but only for the master branch
+  # Triggers the workflow on push or pull request events but only for the main branch
   push:
+    branches:
+      - main
   pull_request:
+    branches:
+      - main
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
@@ -16,11 +20,13 @@ jobs:
   build:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
+    # set a sensible timeout
+    timeout-minutes: 20
     
     # Specify the python versions to test
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
@@ -80,14 +86,14 @@ jobs:
           format: cobertura
 
       - name: Echo tag name
-        run: echo "Tag is ${{ github.ref }}, Deploy is ${{ startsWith(github.ref, 'refs/tags/') && matrix.python-version == 3.9}}"
+        run: echo "Tag is ${{ github.ref }}, Deploy is ${{ startsWith(github.ref, 'refs/tags/') && matrix.python-version == 3.10}}"
 
       - name: Build a binary wheel and a source tarball
         shell: bash -el {0}
         run: python -m poetry build
 
       - name: Publish distribution 📦 to PyPI
-        if: ${{ startsWith(github.ref, 'refs/tags/') && success() && matrix.python-version == 3.9}}
+        if: ${{ startsWith(github.ref, 'refs/tags/') && success() && matrix.python-version == 3.10}}
         env:
           POETRY_PYPI_TOKEN_PYPI: ${{ secrets.PYPI_API_TOKEN }}
         shell: bash -el {0}
@@ -102,5 +108,5 @@ jobs:
         uses: coverallsapp/github-action@v2
         with:
           parallel-finished: true
-          carryforward: "python3.9,python3.10,python3.11,python3.12"
+          carryforward: "python3.10,python3.11,python3.12"
           github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/pyproject.toml b/pyproject.toml
index 1eef538c..69e87d4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,6 @@ classifiers = [
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",