diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
index 34e8fb5..68668fe 100644
--- a/.github/workflows/backend-ci.yml
+++ b/.github/workflows/backend-ci.yml
@@ -15,42 +15,42 @@ jobs:
 
     steps:
       - name: Checkout code without submodules
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2  # Using v2 for actions/checkout
         with:
           submodules: false  # Skips submodule initialization
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v2  # Using v2 for setup-python
         with:
           python-version: '3.11'
 
       - name: Install dependencies
         run: |
           python -m venv venv
-          source venv/bin/activate  # Ensure the virtual environment is activated
-          pip install -r backend/requirements.txt  # Install all dependencies, including requests
+          source venv/bin/activate
+          pip install -r requirements.txt  # Ensure all dependencies are installed, including requests
 
       - name: Cache Python dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v2  # Using v2 for actions/cache
         with:
           path: venv
-          key: ${{ runner.os }}-python-${{ hashFiles('backend/requirements.txt') }}
+          key: ${{ runner.os }}-python-${{ hashFiles('**/requirements.txt') }}
           restore-keys: |
             ${{ runner.os }}-python-
 
       - name: Run pylint (backend only on changed files)
         run: |
-          source venv/bin/activate  # Activate the virtual environment before running pylint
-          changed_files=$(git diff --name-only origin/main...HEAD | grep '^backend/' || true)
+          source venv/bin/activate
+          changed_files=$(git diff --name-only origin/main...HEAD | grep '\.py$' || true)
           
           if [ -n "$changed_files" ]; then
-            pylint backend --exit-zero | tee pylint.log
+            pylint $changed_files --exit-zero | tee pylint.log
             SCORE=$(tail -n 2 pylint.log | grep -oP '[0-9]+\.[0-9]+(?=/10)')
             echo "Pylint score: $SCORE"
             python -c "import sys; sys.exit(0 if float('$SCORE') >= 8.0 else 1)"
           else
-            echo "No Python files changed in the backend, skipping pylint."
-            exit 0  # Exit with status 0 (success) if no Python files changed in the backend
+            echo "No Python files changed, skipping pylint."
+            exit 0  # Exit with status 0 (success) if no Python files changed
           fi
 
   test:
@@ -59,24 +59,24 @@ jobs:
 
     steps:
       - name: Checkout code without submodules
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2  # Using v2 for actions/checkout
         with:
           submodules: false  # Skips submodule initialization
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v2  # Using v2 for setup-python
         with:
           python-version: '3.11'
 
       - name: Install dependencies
         run: |
           python -m venv venv
-          source venv/bin/activate  # Ensure the virtual environment is activated
-          pip install -r backend/requirements.txt  # Install dependencies, including requests
+          source venv/bin/activate
+          pip install -r backend/requirements.txt  # Ensure all dependencies are installed, including requests
           pip install pytest-html
 
       - name: Cache Python dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v2  # Using v2 for actions/cache
         with:
           path: venv
           key: ${{ runner.os }}-python-${{ hashFiles('backend/requirements.txt') }}
@@ -103,7 +103,7 @@ jobs:
           pytest backend/tests --html=backend/test-report.html --self-contained-html
 
       - name: Upload test report
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v2  # Using v2 for actions/upload-artifact
         with:
           name: backend-test-report
           path: backend/test-report.html
@@ -118,17 +118,17 @@ jobs:
 
     steps:
       - name: Checkout repository without submodules
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2  # Using v2 for actions/checkout
         with:
           submodules: false  # Skips submodule initialization
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v3  # Using the latest stable version for Node.js
         with:
           node-version: '20'
 
       - name: Cache node modules
-        uses: actions/cache@v3
+        uses: actions/cache@v2  # Using v2 for actions/cache
         with:
           path: frontend/node_modules
           key: ${{ runner.os }}-node-${{ hashFiles('frontend/package-lock.json') }}