diff --git a/view.py b/view.py
index a7466fa8..ce468b76 100644
--- a/view.py
+++ b/view.py
@@ -1564,7 +1564,10 @@ class View():
         vrct_gui.confirmation_modal.hide_buttons()
         vrct_gui.update()
         vrct_gui.confirmation_modal.update()
-        callFunctionIfCallable(self.view_variable.CALLBACK_UPDATE_SOFTWARE)
+        # vrct_gui.confirmation_modal.grab_set() #Tmp
+        def func(progress):
+            vrct_gui.confirmation_modal.updateDownloadProgress(progress=progress)
+        callFunctionIfCallable(self.view_variable.CALLBACK_UPDATE_SOFTWARE, func)
 
 
 
diff --git a/vrct_gui/_CreateConfirmationModal.py b/vrct_gui/_CreateConfirmationModal.py
index 7391a594..898e9c84 100644
--- a/vrct_gui/_CreateConfirmationModal.py
+++ b/vrct_gui/_CreateConfirmationModal.py
@@ -1,6 +1,6 @@
-from customtkinter import CTkToplevel, CTkFrame, CTkLabel, CTkFont
+from customtkinter import CTkToplevel, CTkFrame, CTkLabel, CTkFont, CTkProgressBar
 
-from .ui_utils import fadeInAnimation, setGeometryToCenterOfTheWidget, bindButtonFunctionAndColor
+from .ui_utils import fadeInAnimation, setGeometryToCenterOfTheWidget, bindButtonFunctionAndColor, generateGradientColor
 
 from utils import callFunctionIfCallable
 
@@ -13,6 +13,7 @@ class _CreateConfirmationModal(CTkToplevel):
         self.settings = settings
         self._view_variable = view_variable
 
+        self.is_showed_progressbar = False
 
         self.title("")
         self.overrideredirect(True)
@@ -69,6 +70,18 @@ class _CreateConfirmationModal(CTkToplevel):
         self.modal_buttons_wrapper.grid(row=1, column=0, sticky="ew")
 
 
+        # Progress bar
+        self.progressbar_widget = CTkProgressBar(
+            self.modal_contents_wrapper,
+            height=8,
+            corner_radius=0,
+            fg_color="black",
+            # fg_color="#4b4c4f",
+            progress_color="gray",
+        )
+        self.progressbar_widget.set(0)
+
+
         if modal_type == "information":
             self.modal_buttons_wrapper.grid_columnconfigure((0,2), weight=1)
 
@@ -237,5 +250,21 @@ class _CreateConfirmationModal(CTkToplevel):
             return
         callFunctionIfCallable(self._view_variable.CALLBACK_HIDE_CONFIRMATION_MODAL)
 
+
+    def updateDownloadProgress(self, progress:float):
+        if self.is_showed_progressbar is False:
+            self.progressbar_widget.place(relwidth=0.9, relx=0.5, rely=0.84, anchor="s")
+            self.is_showed_progressbar = True
+            self.update()
+
+        progress_color = generateGradientColor(
+            value=progress,
+            color_start=[242, 242, 242], # RGB values for #f2f2f2
+            color_end=[72, 164, 149], # RGB values for #48a495
+        )
+        self.progressbar_widget.configure(progress_color=progress_color)
+        self.progressbar_widget.set(progress)
+        self.update_idletasks()
+
     def _grab_set(self):
         self.grab_set()
diff --git a/vrct_gui/splash_window/SplashWindow.py b/vrct_gui/splash_window/SplashWindow.py
index 3a1084c0..a0b5ad31 100644
--- a/vrct_gui/splash_window/SplashWindow.py
+++ b/vrct_gui/splash_window/SplashWindow.py
@@ -2,7 +2,7 @@ import math
 import time
 
 from customtkinter import CTkImage, CTkLabel, CTkToplevel, CTkProgressBar, CTkFrame
-from ..ui_utils import openImageKeepAspectRatio, getImageFileFromUiUtils, setGeometryToCenterOfScreen, fadeInAnimation
+from ..ui_utils import openImageKeepAspectRatio, getImageFileFromUiUtils, setGeometryToCenterOfScreen, fadeInAnimation, generateGradientColor
 
 class SplashWindow(CTkToplevel):
     def __init__(self):
@@ -200,25 +200,6 @@ class SplashWindow(CTkToplevel):
         rotated_image = image.rotate(angle, expand=True)
         return rotated_image
 
-        # This making gradient color process was made by ChatGPT.
-    def generateGradientColor(self, value):
-        # 0の時の色と1の時の色を指定
-        color_start = [242, 242, 242]  # RGB values for #f2f2f2
-        color_end = [72, 164, 149]    # RGB values for #48a495
-
-        # 補完色を計算
-        interpolated_color = [
-            int(start + (end - start) * value) for start, end in zip(color_start, color_end)
-        ]
-
-        # RGB値を0から255の範囲にクリップ
-        interpolated_color = [max(0, min(255, val)) for val in interpolated_color]
-
-        # RGBを16進数に変換
-        hex_color = "#{:02x}{:02x}{:02x}".format(*interpolated_color)
-
-        return hex_color
-
 
     def updateDownloadProgress(self, progress:float):
         if self.is_showed_weight_download_progressbar is False:
@@ -232,7 +213,11 @@ class SplashWindow(CTkToplevel):
             self.is_showed_weight_download_progressbar = True
             self.update()
 
-        progress_color = self.generateGradientColor(progress)
+        progress_color = generateGradientColor(
+            value=progress,
+            color_start=[242, 242, 242], # RGB values for #f2f2f2
+            color_end=[72, 164, 149], # RGB values for #48a495
+        )
         self.weight_download_progressbar_widget.configure(progress_color=progress_color)
         self.weight_download_progressbar_widget.set(progress)
         self.update_idletasks()
diff --git a/vrct_gui/ui_utils/ui_utils.py b/vrct_gui/ui_utils/ui_utils.py
index fc4b35e7..7af40855 100644
--- a/vrct_gui/ui_utils/ui_utils.py
+++ b/vrct_gui/ui_utils/ui_utils.py
@@ -71,6 +71,22 @@ def calculateUiSize(default_size, scaling_float, is_allowed_odd:bool=False, is_z
 
     return size
 
+# This making gradient color process was made by ChatGPT.
+def generateGradientColor(value, color_start, color_end):
+    # 補完色を計算
+    interpolated_color = [
+        int(start + (end - start) * value) for start, end in zip(color_start, color_end)
+    ]
+
+    # RGB値を0から255の範囲にクリップ
+    interpolated_color = [max(0, min(255, val)) for val in interpolated_color]
+
+    # RGBを16進数に変換
+    hex_color = "#{:02x}{:02x}{:02x}".format(*interpolated_color)
+
+    return hex_color
+
+
 def bindEnterAndLeaveColor(target_widgets, enter_color, leave_color):
     for target_widget in target_widgets:
         target_widget.bind("<Enter>", lambda e, widgets=target_widgets: [w.configure(fg_color=enter_color) for w in widgets], "+")