diff --git a/src/UI_YUVviewer.py b/src/UI_YUVviewer.py
index e40753b..2471200 100644
--- a/src/UI_YUVviewer.py
+++ b/src/UI_YUVviewer.py
@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
 
-# Form implementation generated from reading ui file 'UI_YUVviewer.ui'
+# Form implementation generated from reading ui file './src/UI_YUVviewer.ui'
 #
-# Created by: PyQt5 UI code generator 5.9.2
+# Created by: PyQt5 UI code generator 5.6
 #
 # WARNING! All changes made in this file will be lost!
 
@@ -11,13 +11,13 @@
 class Ui_YUVviewer(object):
     def setupUi(self, YUVviewer):
         YUVviewer.setObjectName("YUVviewer")
-        YUVviewer.resize(470, 155)
+        YUVviewer.resize(550, 155)
         sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Fixed)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(YUVviewer.sizePolicy().hasHeightForWidth())
         YUVviewer.setSizePolicy(sizePolicy)
-        YUVviewer.setMinimumSize(QtCore.QSize(470, 155))
+        YUVviewer.setMinimumSize(QtCore.QSize(550, 155))
         YUVviewer.setMaximumSize(QtCore.QSize(16777215, 155))
         self.centralwidget = QtWidgets.QWidget(YUVviewer)
         self.centralwidget.setObjectName("centralwidget")
@@ -217,3 +217,4 @@ def retranslateUi(self, YUVviewer):
         self.openFolder_PushButton.setText(_translate("YUVviewer", "Open folder"))
         self.about_PushButton.setText(_translate("YUVviewer", "About"))
         self.help_PushButton.setText(_translate("YUVviewer", "Help"))
+
diff --git a/src/UI_YUVviewer.ui b/src/UI_YUVviewer.ui
index 38749a0..fbb7db5 100644
--- a/src/UI_YUVviewer.ui
+++ b/src/UI_YUVviewer.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>470</width>
+    <width>550</width>
     <height>155</height>
    </rect>
   </property>
@@ -18,7 +18,7 @@
   </property>
   <property name="minimumSize">
    <size>
-    <width>470</width>
+    <width>550</width>
     <height>155</height>
    </size>
   </property>
diff --git a/src/YUVviewer.cpp b/src/YUVviewer.cpp
index f299dc0..f5c8599 100644
--- a/src/YUVviewer.cpp
+++ b/src/YUVviewer.cpp
@@ -71,6 +71,9 @@ YUVviewer::YUVviewer(QWidget *parent) :
         ui->frameSizeType_ComboBox->insertItem(ui->frameSizeType_ComboBox->count(),config_it->first);
         config_it++;
     }
+    ui->frameSizeType_ComboBox->setStyleSheet("combobox-popup: 0;");
+    ui->YUVFormat_ComboBox->setStyleSheet("combobox-popup: 0;");
+    ui->frameRate_ComboBox->setStyleSheet("combobox-popup: 0;");
 
     YUVviewerConfigFile = new ConfigFile(QCoreApplication::applicationDirPath()+"/YUVViewer.ini");
     if(YUVviewerConfigFile->config_dict.frameSizeType == "Other")
diff --git a/src/YUVviewer.py b/src/YUVviewer.py
index eee2165..c0a12ff 100644
--- a/src/YUVviewer.py
+++ b/src/YUVviewer.py
@@ -55,6 +55,10 @@ def __init__(self):
         size = self.geometry()
         self.move((screen.width() - size.width()) / 2, (screen.height() - size.height()) / 2)
 
+        self.ui.frameSizeType_ComboBox.setStyleSheet("combobox-popup: 0;")
+        self.ui.YUVFormat_ComboBox.setStyleSheet("combobox-popup: 0;")
+        self.ui.frameRate_ComboBox.setStyleSheet("combobox-popup: 0;")
+
         for key,value in self.frameSizeTypeDict.items():
             self.ui.frameSizeType_ComboBox.insertItem(self.ui.frameSizeType_ComboBox.count(), key)