diff --git a/EasyOCRLabel.py b/EasyOCRLabel.py
index 3db9ea5..9c0c8b4 100644
--- a/EasyOCRLabel.py
+++ b/EasyOCRLabel.py
@@ -1417,17 +1417,18 @@ def _get_rgb_by_label(self, label, kie_mode):
     def scrollRequest(self, delta, orientation):
         units = - delta / (8 * 15)
         bar = self.scrollBars[orientation]
-        bar.setValue(bar.value() + bar.singleStep() * units)
+        
+        bar.setValue(int(bar.value() + bar.singleStep() * units))
 
     def setZoom(self, value):
         self.actions.fitWidth.setChecked(False)
         self.actions.fitWindow.setChecked(False)
         self.zoomMode = self.MANUAL_ZOOM
-        self.zoomWidget.setValue(value)
+        self.zoomWidget.setValue(int(value))
 
     def addZoom(self, increment=10):
         self.setZoom(self.zoomWidget.value() + increment)
-        self.imageSlider.setValue(self.zoomWidget.value() + increment)  # set zoom slider value
+        self.imageSlider.setValue(int(self.zoomWidget.value() + increment))  # set zoom slider value
 
     def zoomRequest(self, delta):
         # get the current scrollbar positions
@@ -1467,7 +1468,7 @@ def zoomRequest(self, delta):
         # zoom in
         units = delta / (8 * 15)
         scale = 10
-        self.addZoom(scale * units)
+        self.addZoom(int(scale * units))
 
         # get the difference in scrollbar values
         # this is how far we can move
@@ -1478,8 +1479,8 @@ def zoomRequest(self, delta):
         new_h_bar_value = h_bar.value() + move_x * d_h_bar_max
         new_v_bar_value = v_bar.value() + move_y * d_v_bar_max
 
-        h_bar.setValue(new_h_bar_value)
-        v_bar.setValue(new_v_bar_value)
+        h_bar.setValue(int(new_h_bar_value))
+        v_bar.setValue(int(new_v_bar_value))
 
     def setFitWindow(self, value=True):
         if value:
diff --git a/requirements.txt b/requirements.txt
index cb6a855..ad29207 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
+opencv-python-headless # installing the opencv-python-headless for xcd error in pyqt
 pyqt5
 easyocr
 xlrd==1.2.0