diff --git a/core/compositor_setup.py b/core/compositor_setup.py
index 6a134ab..3938f09 100644
--- a/core/compositor_setup.py
+++ b/core/compositor_setup.py
@@ -8,7 +8,7 @@ only to masked regions of a video strip.
 def create_mask_blur_node_tree(
     name: str = "FaceMaskBlur",
     blur_size: int = 50,
-) -> "bpy.types.NodeTree":
+) -> "bpy.types.NodeTree":  # noqa: F821
     """
     Create a compositing node tree for mask-based blur.
     
@@ -107,10 +107,10 @@ def create_mask_blur_node_tree(
 
 
 def setup_strip_compositor_modifier(
-    strip: "bpy.types.Strip",
-    mask_strip: "bpy.types.Strip",
-    node_tree: "bpy.types.NodeTree",
-) -> "bpy.types.SequenceModifier":
+    strip: "bpy.types.Strip",  # noqa: F821
+    mask_strip: "bpy.types.Strip",  # noqa: F821
+    node_tree: "bpy.types.NodeTree",  # noqa: F821
+) -> "bpy.types.SequenceModifier":  # noqa: F821
     """
     Add a Compositor modifier to a strip using the mask-blur node tree.
     
@@ -148,7 +148,7 @@ def setup_strip_compositor_modifier(
     return modifier
 
 
-def get_or_create_blur_node_tree(blur_size: int = 50) -> "bpy.types.NodeTree":
+def get_or_create_blur_node_tree(blur_size: int = 50) -> "bpy.types.NodeTree":  # noqa: F821
     """
     Get existing or create new blur node tree with specified blur size.
     
diff --git a/server/main.py b/server/main.py
index 40f4fea..1932576 100644
--- a/server/main.py
+++ b/server/main.py
@@ -31,25 +31,25 @@ def fix_library_path():
 # Fix library path BEFORE any other imports
 fix_library_path()
 
-import queue
-import threading
-import uuid
-import traceback
-import subprocess
-from typing import Dict, Optional, List
-from pathlib import Path
+import queue  # noqa: E402
+import threading  # noqa: E402
+import uuid  # noqa: E402
+import traceback  # noqa: E402
+import subprocess  # noqa: E402
+from typing import Dict, Optional, List  # noqa: E402
+from pathlib import Path  # noqa: E402
 
-from fastapi import FastAPI, HTTPException, BackgroundTasks
-from pydantic import BaseModel
-import uvicorn
-import cv2
-import numpy as np
-import msgpack
+from fastapi import FastAPI, HTTPException, BackgroundTasks  # noqa: E402
+from pydantic import BaseModel  # noqa: E402
+import uvicorn  # noqa: E402
+import cv2  # noqa: E402
+import numpy as np  # noqa: E402
+import msgpack  # noqa: E402
 
 # Add project root to path for imports if needed
 sys.path.append(str(Path(__file__).parent.parent))
 
-from server.detector import get_detector
+from server.detector import get_detector  # noqa: E402
 
 app = FastAPI(title="Face Mask Inference Server")