diff --git a/VRCT.py b/VRCT.py
index 00a2fc99..7fb09bd1 100644
--- a/VRCT.py
+++ b/VRCT.py
@@ -328,7 +328,6 @@ class App(CTk):
             image=CTkImage(Image_open(os_path.join(os_path.dirname(__file__), "img", "config-icon-white.png")))
         )
         self.button_config.grid(row=5, column=1, padx=(5, 10), pady=(5, 5), sticky="wse")
-        self.config_window = None
 
         # load ui language data
         language_yaml_data = get_localized_text(f"{self.UI_LANGUAGE}")
@@ -400,10 +399,13 @@ class App(CTk):
         self.config_window = ToplevelWindowConfig(self)
 
     def button_config_callback(self):
-        self.config_window.deiconify()
         self.checkbox_translation.configure(state="disabled")
         self.checkbox_transcription_send.configure(state="disabled")
         self.checkbox_transcription_receive.configure(state="disabled")
+        self.button_config.configure(state="disabled", fg_color=["gray92", "gray14"])
+
+        self.config_window.deiconify()
+        self.config_window.focus_set()
         self.config_window.focus()
 
     def button_information_callback(self):
diff --git a/window_config.py b/window_config.py
index 17e5efdf..9acb8e13 100644
--- a/window_config.py
+++ b/window_config.py
@@ -415,6 +415,7 @@ class ToplevelWindowConfig(CTkToplevel):
         self.parent.checkbox_translation.configure(state="normal")
         self.parent.checkbox_transcription_send.configure(state="normal")
         self.parent.checkbox_transcription_receive.configure(state="normal")
+        self.parent.button_config.configure(state="normal", fg_color=["#3B8ED0", "#1F6AA5"])
         self.parent.config_window.withdraw()
 
     def entry_message_format_callback(self, event):