diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7279848..1c202fd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -140,8 +140,8 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          tag_name: v2.5.7
-          name: v2.5.7
+          tag_name: v2.5.8
+          name: v2.5.8
           body: |
             Add window icons to MacOS and Linux.
           draft: false
diff --git a/PySN.py b/PySN.py
index 337da90..3cc08d6 100644
--- a/PySN.py
+++ b/PySN.py
@@ -9,6 +9,7 @@
 import yaml
 import time
 import sys
+from tkinter import PhotoImage
 from pathlib import Path
 from fnmatch import fnmatch
 from configparser import ConfigParser
@@ -316,7 +317,7 @@ def __init__(self):
         if sys.platform == 'win32':
             self.iconbitmap(resource_path("AphIcon.ico"))
         elif sys.platform in ['linux', 'darwin']:
-            icon = tk.PhotoImage(file=resource_path("AphIcon.png"))
+            icon = PhotoImage(file=resource_path("AphIcon.png"))
             self.after(0, lambda: self.iconphoto(True, icon))
 
         self.entry = customtkinter.CTkEntry(master=self, placeholder_text='Enter Serial', width = 125)