diff --git a/main.py b/main.py
index c422d73..4509a94 100644
--- a/main.py
+++ b/main.py
@@ -84,6 +84,12 @@ def stop_typing(self):
             self.thread.wait()
             self.thread = None
         self.typing_finished()
+    
+    def toggleTheme(self):
+        if self.lightModeCheckBox.isChecked():
+            self.setStyleSheet(open("style.css").read())
+        else:
+            self.setStyleSheet(open("darkmode.css").read())
 
 if __name__ == "__main__":
     app = QApplication(sys.argv)
diff --git a/ui.py b/ui.py
index 70ea574..8302fc8 100644
--- a/ui.py
+++ b/ui.py
@@ -92,6 +92,8 @@ def setupUi(self, MainWindow):
 
         self.lightModeCheckBox = QtWidgets.QCheckBox(self.horizontalLayoutWidget)
         self.lightModeCheckBox.setObjectName("lightModeCheckBox")
+        self.lightModeCheckBox.clicked.connect(self.toggleTheme)
+        self.lightModeCheckBox.setChecked(True)
         self.settingsLayout.addWidget(self.lightModeCheckBox)
         
         self.horizontalLayout.addLayout(self.settingsLayout)