diff --git a/Makefile b/Makefile
index 62ae641..4db295e 100644
--- a/Makefile
+++ b/Makefile
@@ -10,123 +10,123 @@ all: run
 
 # Remove all generated files and directories
 clean:
-    rm -rf venv build dist .pytest_cache .mypy_cache *.egg-info
+	rm -rf venv build dist .pytest_cache .mypy_cache *.egg-info
 
 # Define database path
 DB_PATH=scipaperloader/papers.db
 
 # Backup the database with timestamp
 backup-db:
-    @mkdir -p backups
-    @timestamp=$$(date +%Y%m%d_%H%M%S); \
-    cp $(DB_PATH) backups/papers_$$timestamp.db && \
-    echo "Database backed up to backups/papers_$$timestamp.db"
+	@mkdir -p backups
+	@timestamp=$$(date +%Y%m%d_%H%M%S); \
+	cp $(DB_PATH) backups/papers_$$timestamp.db && \
+	echo "Database backed up to backups/papers_$$timestamp.db"
 
 # Create sample test data for development and testing
 sample-data: venv
-    $(PYTHON) scipaperloader/scripts/create_sample_data.py
+	$(PYTHON) scipaperloader/scripts/create_sample_data.py
 
 # Export database as SQL script with timestamp
 export-db: venv
-    @mkdir -p exports
-    @timestamp=$$(date +%Y%m%d_%H%M%S); \
-    $(PYTHON) -c "import sqlite3; conn = sqlite3.connect('$(DB_PATH)'); with open('exports/papers_$$timestamp.sql', 'w') as f: f.write(''.join(conn.iterdump()));" && \
-    echo "Database exported to exports/papers_$$timestamp.sql"
+	@mkdir -p exports
+	@timestamp=$$(date +%Y%m%d_%H%M%S); \
+	$(PYTHON) -c "import sqlite3; conn = sqlite3.connect('$(DB_PATH)'); with open('exports/papers_$$timestamp.sql', 'w') as f: f.write(''.join(conn.iterdump()));" && \
+	echo "Database exported to exports/papers_$$timestamp.sql"
 
 # Run the application with production settings
 run-prod: venv
-    FLASK_ENV=production venv/bin/flask --app scipaperloader run --host=0.0.0.0
+	FLASK_ENV=production venv/bin/flask --app scipaperloader run --host=0.0.0.0
 
 # Check for security vulnerabilities in dependencies
 security-check: venv
-    $(PIP) install safety
-    venv/bin/safety check
+	$(PIP) install safety
+	venv/bin/safety check
 
 # Create a new database migration with provided message
 db-migrate: venv
-    venv/bin/flask --app scipaperloader db migrate -m "$(message)"
+	venv/bin/flask --app scipaperloader db migrate -m "$(message)"
 
 # Apply pending database migrations
 db-upgrade: venv
-    venv/bin/flask --app scipaperloader db upgrade
+	venv/bin/flask --app scipaperloader db upgrade
 
 # Revert the last database migration
 db-downgrade: venv
-    venv/bin/flask --app scipaperloader db downgrade
+	venv/bin/flask --app scipaperloader db downgrade
 
 # Generate API documentation using Sphinx
 docs: venv
-    $(PIP) install sphinx sphinx_rtd_theme
-    cd docs && venv/bin/sphinx-build -b html source build
+	$(PIP) install sphinx sphinx_rtd_theme
+	cd docs && venv/bin/sphinx-build -b html source build
 
 # Create a code coverage report for the test suite
 coverage: venv
-    $(PYTHON) -m pytest --cov=scipaperloader --cov-report=html
-    @echo "Coverage report generated in htmlcov/"
+	$(PYTHON) -m pytest --cov=scipaperloader --cov-report=html
+	@echo "Coverage report generated in htmlcov/"
 
 # Generate a requirements.txt file from current environment
 requirements: venv
-    $(PIP) freeze > requirements.txt
-    @echo "Requirements file updated"
+	$(PIP) freeze > requirements.txt
+	@echo "Requirements file updated"
 
 # Show project statistics (code lines, routes, database size)
 stats:
-    @echo "Lines of Python code:"
-    @find scipaperloader -name "*.py" | xargs wc -l | sort -nr
-    @echo "Number of routes:"
-    @grep -r "@bp.route" scipaperloader | wc -l
-    @echo "Database file size:"
-    @du -h $(DB_PATH) 2>/dev/null || echo "Database file not found"
+	@echo "Lines of Python code:"
+	@find scipaperloader -name "*.py" | xargs wc -l | sort -nr
+	@echo "Number of routes:"
+	@grep -r "@bp.route" scipaperloader | wc -l
+	@echo "Database file size:"
+	@du -h $(DB_PATH) 2>/dev/null || echo "Database file not found"
 
 # Show TODOs and FIXMEs in code
 todos:
-    @grep -r "TODO\|FIXME" scipaperloader || echo "No TODOs found"
+	@grep -r "TODO\|FIXME" scipaperloader || echo "No TODOs found"
 
 # Reset the database: delete, initialize, and migrate
 reset-db:
-    rm -f $(DB_PATH)
-    flask db init || true
-    flask db migrate -m "Initial migration"
-    flask db upgrade
+	rm -f $(DB_PATH)
+	flask db init || true
+	flask db migrate -m "Initial migration"
+	flask db upgrade
 
 # Create and set up virtual environment
 venv:
-    python3 -m venv venv && \
-        $(PIP) install --upgrade pip setuptools && \
-        $(PIP) install --editable ".[dev]"
+	python3 -m venv venv && \
+		$(PIP) install --upgrade pip setuptools && \
+		$(PIP) install --editable ".[dev]"
 
 # Run the application in debug mode
 run: venv
-    venv/bin/flask --app scipaperloader --debug run
+	venv/bin/flask --app scipaperloader --debug run
 
 # Format code using Black and isort
 format:
-    venv/bin/black .
-    venv/bin/isort .
+	venv/bin/black .
+	venv/bin/isort .
 
 # Check if code meets formatting standards
 format-check:
-    venv/bin/black --check .
-    venv/bin/isort --check .
+	venv/bin/black --check .
+	venv/bin/isort --check .
 
 # Reformat and lint code
 reformat: format lint
 
 # Check code for style issues using flake8
 lint:
-    venv/bin/flake8 .
+	venv/bin/flake8 .
 
 # Run static type checking with mypy
 mypy:
-    venv/bin/mypy scipaperloader
+	venv/bin/mypy scipaperloader
 
 # Run the test suite
 test:
-    venv/bin/pytest
+	venv/bin/pytest
 
 # Build distribution package after running checks
 dist: format-check lint mypy test
-    $(PIP) wheel --wheel-dir dist --no-deps .
+	$(PIP) wheel --wheel-dir dist --no-deps .
 
 # Set up complete development environment
 dev: clean venv