diff --git a/backend/ai_service.py b/backend/ai_service.py
index 7915ddc6d..c88eda66c 100644
--- a/backend/ai_service.py
+++ b/backend/ai_service.py
@@ -38,7 +38,7 @@ def process_new_book(book_data):
 
 
 # Import caching decorators
-from cache_service import (
+from backend.cache_service import (
     cache_recommendations, 
     cache_mood_tags, 
     cache_chat_response,
@@ -74,7 +74,7 @@ def process_new_book(book_data):
 
 # Try to import mood analysis
 try:
-    from mood_analysis.ai_service_enhanced import get_book_mood_tags, generate_enhanced_book_note
+    from backend.mood_analysis.ai_service_enhanced import get_book_mood_tags, generate_enhanced_book_note
     MOOD_ANALYSIS_AVAILABLE = True
 except ImportError:
     MOOD_ANALYSIS_AVAILABLE = False
diff --git a/backend/app.py b/backend/app.py
index 7acccd540..0c7b70497 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -114,7 +114,7 @@
 
 # Try to import enhanced mood analysis
 try:
-    from mood_analysis.ai_service_enhanced import AIBookService
+    from backend.mood_analysis.ai_service_enhanced import AIBookService
     MOOD_ANALYSIS_AVAILABLE = True
 except ImportError:
     MOOD_ANALYSIS_AVAILABLE = False
diff --git a/backend/price_tracker/price_tracker.py b/backend/price_tracker/price_tracker.py
index 524baf936..536dbd2bc 100644
--- a/backend/price_tracker/price_tracker.py
+++ b/backend/price_tracker/price_tracker.py
@@ -10,7 +10,7 @@
 from typing import Dict, List, Optional, Any
 from datetime import datetime, timedelta, timezone
 from dotenv import load_dotenv
-from core.validators.validators import validate_google_books_id
+from backend.validators import validate_google_books_id
 
 # Load environment variables
 load_dotenv()
diff --git a/backend/purchase_links/__init__.py b/backend/purchase_links/__init__.py
index 0160890ab..b7c35b27a 100644
--- a/backend/purchase_links/__init__.py
+++ b/backend/purchase_links/__init__.py
@@ -20,7 +20,7 @@
     links = manager.get_purchase_links(book_data)
 """
 
-from .config import app.config, SUPPORTED_PLATFORMS
+from .config import config, SUPPORTED_PLATFORMS
 from .link_generators import get_all_generators, PurchaseLink
 from .purchase_service import PurchaseLinkService
 from .purchase_manager import PurchaseManager, get_purchase_links_for_book, get_quick_purchase_links
diff --git a/backend/purchase_links/link_generators.py b/backend/purchase_links/link_generators.py
index d6b96fa19..b9404291e 100644
--- a/backend/purchase_links/link_generators.py
+++ b/backend/purchase_links/link_generators.py
@@ -12,7 +12,7 @@
 from enum import Enum
 import re
 
-from .config import app.config, SEARCH_PATTERNS, PlatformConfig
+from .config import config, SEARCH_PATTERNS, PlatformConfig
 
 # Setup logging
 logger = logging.getLogger(__name__)
diff --git a/backend/purchase_links/purchase_service.py b/backend/purchase_links/purchase_service.py
index ab4893ee5..f41a8c08a 100644
--- a/backend/purchase_links/purchase_service.py
+++ b/backend/purchase_links/purchase_service.py
@@ -8,7 +8,7 @@
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from dataclasses import asdict
 
-from .config import app.config, SUPPORTED_PLATFORMS, PlatformConfig
+from .config import config, SUPPORTED_PLATFORMS, PlatformConfig
 from .link_generators import get_all_generators, PurchaseLink
 
 # Setup logging