diff --git a/.github/workflows/installer.yml b/.github/workflows/installer.yml
index df9bfd6..b3f8a11 100644
--- a/.github/workflows/installer.yml
+++ b/.github/workflows/installer.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        python-version: [3.8, 3.9, 3.10, 3.11]
       fail-fast: false
 
     steps:
@@ -24,15 +24,15 @@ jobs:
         run: |
           pip install -r test-requirements.txt
       - name: Run tests
-        if: ${{ matrix.python-version != '3.9' }}
+        if: ${{ matrix.python-version != '3.11' }}
         run: |
           python tests.py
       - name: Run tests and coverage
-        if: ${{ matrix.python-version == '3.9' }}
+        if: ${{ matrix.python-version == '3.11' }}
         run: |
           coverage run tests.py
       - name: Upload coverage result
-        if: ${{ matrix.python-version == '3.9' }}
+        if: ${{ matrix.python-version == '3.11' }}
         uses: actions/upload-artifact@v2
         with:
           name: coverage-results
@@ -46,7 +46,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: '3.9'
+          python-version: '3.11'
       - name: Install dependencies
         run: |
           pip install codecov
diff --git a/checks.py b/checks.py
index 8a52cc3..a8022a7 100644
--- a/checks.py
+++ b/checks.py
@@ -14,14 +14,18 @@ def check_version():
     with urlopen("https://raw.githubusercontent.com/modoboa/modoboa-installer/master/version.txt") as r_version:
         remote_version = r_version.read().decode()
     if local_version == "" or remote_version == "":
-        utils.printcolor("Could not check that your installer is up to date: "
-              f"local version: {local_version}, "
-              f"remote version: {remote_version}",
-              utils.YELLOW)
+        utils.printcolor(
+            "Could not check that your installer is up-to-date: "
+            f"local version: {local_version}, "
+            f"remote version: {remote_version}",
+            utils.YELLOW
+        )
     if remote_version != local_version:
-        utils.error("Your installer seems outdated.\n"
-            "Check the README for instruction on how to update.\n"
-            "No support will be provided without an up to date installer!")
+        utils.error(
+            "Your installer seems outdated.\n"
+            "Check README file for instructions about how to update.\n"
+            "No support will be provided without an up-to-date installer!"
+        )
         answer = utils.user_input("Continue anyway? (Y/n) ")
         if not answer.lower().startswith("y"):
             sys.exit(0)