diff --git a/cluster4npu_ui/ui/dialogs/deployment.py b/cluster4npu_ui/ui/dialogs/deployment.py
index e327bc7..4249a9b 100644
--- a/cluster4npu_ui/ui/dialogs/deployment.py
+++ b/cluster4npu_ui/ui/dialogs/deployment.py
@@ -32,8 +32,8 @@ from PyQt5.QtWidgets import (
     QCheckBox, QGroupBox, QScrollArea, QTableWidget, QTableWidgetItem,
     QHeaderView, QMessageBox, QSplitter, QFrame
 )
-from PyQt5.QtCore import Qt, QThread, pyqtSignal, QTimer
-from PyQt5.QtGui import QFont, QColor, QPalette, QImage, QPixmap
+from PyQt5.QtCore import Qt, QThread, pyqtSignal, QTimer, qRegisterMetaType
+from PyQt5.QtGui import QFont, QColor, QPalette, QImage, QPixmap, QTextCursor
 
 # Import our converter and pipeline system
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'core', 'functions'))
@@ -317,6 +317,9 @@ class DeploymentDialog(QDialog):
     
     def __init__(self, pipeline_data: Dict[str, Any], parent=None):
         super().__init__(parent)
+        # Register QTextCursor for thread-safe signal passing
+        qRegisterMetaType(QTextCursor)
+        
         self.pipeline_data = pipeline_data
         self.deployment_worker = None
         self.pipeline_config = None