diff --git a/src/codegraphcontext/cli/registry_commands.py b/src/codegraphcontext/cli/registry_commands.py
index d271f47b6..9c59677c3 100644
--- a/src/codegraphcontext/cli/registry_commands.py
+++ b/src/codegraphcontext/cli/registry_commands.py
@@ -412,7 +412,7 @@ def load_bundle_command(bundle_name: str, clear_existing: bool = False):
                             stats["nodes"] = int(part.split(":")[1].strip().replace(",", ""))
                         elif "Edges:" in part:
                             stats["edges"] = int(part.split(":")[1].strip().replace(",", ""))
-                except:
+                except (ValueError, KeyError, IndexError):
                     pass
             
             return (True, message, stats)
diff --git a/src/codegraphcontext/core/cgc_bundle.py b/src/codegraphcontext/core/cgc_bundle.py
index f438911c2..1a14fea90 100644
--- a/src/codegraphcontext/core/cgc_bundle.py
+++ b/src/codegraphcontext/core/cgc_bundle.py
@@ -25,7 +25,7 @@
 import tempfile
 from pathlib import Path
 from typing import Dict, List, Optional, Any, Tuple
-from datetime import datetime, date
+from datetime import datetime, date, timezone
 import subprocess
 
 from codegraphcontext.utils.debug_log import debug_log, info_logger, error_logger, warning_logger
@@ -284,7 +284,7 @@ def _extract_metadata(self, repo_path: Optional[Path]) -> Dict[str, Any]:
         """Extract metadata about the repository and indexing process."""
         metadata = {
             "cgc_version": self.VERSION,
-            "exported_at": datetime.now().isoformat(),
+            "exported_at": datetime.now(timezone.utc).isoformat(),
             "format_version": "1.0"
         }
         
@@ -404,14 +404,14 @@ def _extract_schema(self) -> Dict[str, Any]:
             try:
                 result = session.run("SHOW CONSTRAINTS")
                 schema["constraints"] = [dict(record) for record in result]
-            except:
+            except Exception:
                 pass
             
             # Get indexes
             try:
                 result = session.run("SHOW INDEXES")
                 schema["indexes"] = [dict(record) for record in result]
-            except:
+            except Exception:
                 pass
         
         return schema
@@ -599,7 +599,7 @@ def _generate_stats(self, repo_path: Optional[Path], node_count: int, edge_count
         stats = {
             "total_nodes": node_count,
             "total_edges": edge_count,
-            "generated_at": datetime.now().isoformat()
+            "generated_at": datetime.now(timezone.utc).isoformat()
         }
         
         with self.db_manager.get_driver().session() as session:
diff --git a/src/codegraphcontext/core/database_kuzu.py b/src/codegraphcontext/core/database_kuzu.py
index 130ebd162..c652f5f0d 100644
--- a/src/codegraphcontext/core/database_kuzu.py
+++ b/src/codegraphcontext/core/database_kuzu.py
@@ -301,7 +301,7 @@ def close_driver(self):
             while not self._pool.empty():
                 try:
                     self._pool.get_nowait()
-                except:
+                except queue.Empty:
                     break
             self._db = None
 
diff --git a/src/codegraphcontext/core/database_ladybug.py b/src/codegraphcontext/core/database_ladybug.py
index b9def79c2..1b642fb57 100644
--- a/src/codegraphcontext/core/database_ladybug.py
+++ b/src/codegraphcontext/core/database_ladybug.py
@@ -301,7 +301,7 @@ def close_driver(self):
             while not self._pool.empty():
                 try:
                     self._pool.get_nowait()
-                except:
+                except queue.Empty:
                     break
             self._db = None
 
diff --git a/src/codegraphcontext/viz/server.py b/src/codegraphcontext/viz/server.py
index a06f767b6..a1da39bf2 100644
--- a/src/codegraphcontext/viz/server.py
+++ b/src/codegraphcontext/viz/server.py
@@ -174,7 +174,7 @@ def get_eid(element):
                                     if not props and hasattr(node, 'items'):
                                         try:
                                             props = dict(node.items())
-                                        except: pass
+                                        except Exception: pass
                                 
                                 # Extract name/label for frontend
                                 # Prefer 'name' property, fallback to 'label', then 'path' or 'Unknown'