diff --git a/SIPPCompare.spec b/SIPPCompare.spec
index 2d5c4c1..3f784b7 100644
--- a/SIPPCompare.spec
+++ b/SIPPCompare.spec
@@ -5,7 +5,7 @@ a = Analysis(
     ['src\\main.py'],
     pathex=[],
     binaries=[],
-    datas=[('gui/*.ui', 'gui')],
+    datas=[('gui/*.ui', 'gui'), ('icon2.ico', '.')],
     hiddenimports=[],
     hookspath=[],
     hooksconfig={},
diff --git a/gui/main_gui.ui b/gui/main_gui.ui
index 64a48cb..8b5f2de 100644
--- a/gui/main_gui.ui
+++ b/gui/main_gui.ui
@@ -7,19 +7,19 @@
     <x>0</x>
     <y>0</y>
     <width>420</width>
-    <height>228</height>
+    <height>240</height>
    </rect>
   </property>
   <property name="minimumSize">
    <size>
     <width>420</width>
-    <height>228</height>
+    <height>240</height>
    </size>
   </property>
   <property name="maximumSize">
    <size>
     <width>420</width>
-    <height>228</height>
+    <height>240</height>
    </size>
   </property>
   <property name="windowTitle">
@@ -35,7 +35,7 @@
       <x>10</x>
       <y>0</y>
       <width>401</width>
-      <height>176</height>
+      <height>184</height>
      </rect>
     </property>
     <layout class="QFormLayout" name="formLayout">
diff --git a/src/main_window.py b/src/main_window.py
index e93499e..d56484a 100644
--- a/src/main_window.py
+++ b/src/main_window.py
@@ -1,4 +1,4 @@
-from PyQt6.QtGui import QIntValidator
+from PyQt6.QtGui import QIntValidator, QIcon
 from PyQt6.QtWidgets import QMainWindow, QWidget
 from PyQt6 import uic
 
@@ -12,6 +12,7 @@ class SIPPCompare(QMainWindow):
         super().__init__()
         # Import Qt Designer UI XML file
         uic.loadUi(resource_finder.get_res_path("gui/main_gui.ui"), self)
+        self.setWindowIcon(QIcon(resource_finder.get_res_path("icon2.ico")))
 
         # Initialise class variables
         # Inputs
diff --git a/src/output_window.py b/src/output_window.py
index e24817a..06933da 100644
--- a/src/output_window.py
+++ b/src/output_window.py
@@ -1,3 +1,4 @@
+from PyQt6.QtGui import QIcon
 from PyQt6.QtWidgets import QWidget
 from PyQt6 import uic
 
@@ -12,6 +13,7 @@ class OutputWindow(QWidget):
         super().__init__()
         # Import Qt Designer UI XML file
         uic.loadUi(resource_finder.get_res_path("gui/output_window.ui"), self)
+        self.setWindowIcon(QIcon(resource_finder.get_res_path("icon2.ico")))
 
         # Initialise class variables
         self.results_str = ""
diff --git a/src/platform_edit.py b/src/platform_edit.py
index a8ad61c..bba78fb 100644
--- a/src/platform_edit.py
+++ b/src/platform_edit.py
@@ -1,5 +1,5 @@
 from PyQt6.QtCore import QRegularExpression
-from PyQt6.QtGui import QRegularExpressionValidator, QFont
+from PyQt6.QtGui import QRegularExpressionValidator, QFont, QIcon
 from PyQt6.QtWidgets import QWidget, QLabel
 from PyQt6 import uic
 
@@ -13,6 +13,7 @@ class PlatformEdit(QWidget):
         super().__init__()
         # Import Qt Designer UI XML file
         uic.loadUi(resource_finder.get_res_path("gui/platform_edit.ui"), self)
+        self.setWindowIcon(QIcon(resource_finder.get_res_path("icon2.ico")))
 
         # Initialise class variables
         # Create main window object, passing this instance as param