diff --git a/.github/actions/build-website/action.yml b/.github/actions/build-website/action.yml
index ea1539a..e14c383 100644
--- a/.github/actions/build-website/action.yml
+++ b/.github/actions/build-website/action.yml
@@ -1,20 +1,21 @@
 name: 'Build huroutes'
 description: 'Builds the huroutes website from source'
-runs:
-  using: 'composite'
-  steps:
-    - name: Minify the website code
-      shell: bash
-      run: |
-          sudo pip install minify-html==0.15.0
-          sudo pip install rjsmin==1.2.3
-          sudo pip install rcssmin==1.2.0
-          sudo pip install lxml==5.3.0
-          python ".github/scripts/optimize-site.py" .
+runs:
+  using: 'composite'
+  steps:
+    - name: Set up isolated Python environment
+      shell: bash
+      run: |
+          python -m venv "$RUNNER_TEMP/huroutes-build-venv"
+          "$RUNNER_TEMP/huroutes-build-venv/bin/python" -m pip install --disable-pip-version-check minify-html==0.15.0 rjsmin==1.2.3 rcssmin==1.2.0 lxml==5.3.0 kml2geojson==5.1.0
+          echo "HUROUTES_BUILD_PYTHON=$RUNNER_TEMP/huroutes-build-venv/bin/python" >> "$GITHUB_ENV"
+    - name: Minify the website code
+      shell: bash
+      run: |
+          "$HUROUTES_BUILD_PYTHON" ".github/scripts/optimize-site.py" .
     - name: Download curves data
-      # This step downloads and converts autogenerated curvature data for a map overlay.
-      # The script supports processing KMZ files provided by kml.roadcurvature.com. "Curve" KMZ format is not supported.
-      shell: bash
-      run: |
-          sudo pip install kml2geojson==5.1.0
-          python ".github/scripts/get-curve-map.py" "https://kml.roadcurvature.com/europe/hungary.c_1000.kmz" "map/curves.geo.json" "map/curves-style.json"
+      # This step downloads and converts autogenerated curvature data for a map overlay.
+      # The script supports processing KMZ files provided by kml.roadcurvature.com. "Curve" KMZ format is not supported.
+      shell: bash
+      run: |
+          "$HUROUTES_BUILD_PYTHON" ".github/scripts/get-curve-map.py" "https://kml.roadcurvature.com/europe/hungary.c_1000.kmz" "map/curves.geo.json" "map/curves-style.json"
diff --git a/.github/workflows/deploy-pr-preview.yml b/.github/workflows/deploy-pr-preview.yml
index 61f129b..8a23636 100644
--- a/.github/workflows/deploy-pr-preview.yml
+++ b/.github/workflows/deploy-pr-preview.yml
@@ -14,12 +14,16 @@ jobs:
   deploy-pr-preview:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Build the website
-        uses: ./.github/actions/build-website
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+      - name: Build the website
+        uses: ./.github/actions/build-website
       - name: Deploy
         uses: rossjrw/pr-preview-action@v1
         with:
           source-dir: .
-          umbrella-dir: pr
\ No newline at end of file
+          umbrella-dir: pr
diff --git a/.github/workflows/deploy-website-build.yml b/.github/workflows/deploy-website-build.yml
index 4f773cf..a945e29 100644
--- a/.github/workflows/deploy-website-build.yml
+++ b/.github/workflows/deploy-website-build.yml
@@ -14,12 +14,16 @@ jobs:
   deploy-website:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-      - name: Build the website
-        uses: ./.github/actions/build-website
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
+      - name: Build the website
+        uses: ./.github/actions/build-website
       - name: Deploy
         uses: JamesIves/github-pages-deploy-action@v4
         with:
           clean-exclude: pr/
-          folder: .
\ No newline at end of file
+          folder: .
diff --git a/.github/workflows/huroutes-static-tests.yml b/.github/workflows/huroutes-static-tests.yml
index b10f414..0d38ae6 100644
--- a/.github/workflows/huroutes-static-tests.yml
+++ b/.github/workflows/huroutes-static-tests.yml
@@ -16,11 +16,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
-      - name: Ensure the jsonschema lib
-        run: sudo pip install jsonschema
+        uses: actions/checkout@v6
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.12'
       - name: Run the check
-        run: python ".github/scripts/validate-database.py" data.json data.schema.json
+        run: |
+          python -m venv "$RUNNER_TEMP/huroutes-test-venv"
+          "$RUNNER_TEMP/huroutes-test-venv/bin/python" -m pip install --disable-pip-version-check jsonschema
+          "$RUNNER_TEMP/huroutes-test-venv/bin/python" ".github/scripts/validate-database.py" data.json data.schema.json
   codeql:
     # Runs CodeQL checks on javascript source code
     name: Analyze
@@ -34,13 +39,13 @@ jobs:
       matrix:
         language: [ 'javascript' ]
     steps:
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
-      with:
-        languages: ${{ matrix.language }}
-    - name: Checkout
-      uses: actions/checkout@v3
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      - name: Checkout
+        uses: actions/checkout@v6
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v4
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4