diff --git a/npbackup/__main__.py b/npbackup/__main__.py
index 414e7d5..727e1c9 100644
--- a/npbackup/__main__.py
+++ b/npbackup/__main__.py
@@ -239,7 +239,7 @@ This is free software, and you are welcome to redistribute it under certain cond
 
     if args.license:
         try:
-            with open(LICENSE_FILE, "r", "utf-8") as file_handle:
+            with open(LICENSE_FILE, "r", encoding="utf-8") as file_handle:
                 print(file_handle.read())
         except OSError:
             print(LICENSE_TEXT)
diff --git a/npbackup/gui/main.py b/npbackup/gui/main.py
index 8d6668c..86a9d11 100644
--- a/npbackup/gui/main.py
+++ b/npbackup/gui/main.py
@@ -61,7 +61,7 @@ def _about_gui(version_string: str, config_dict: dict) -> None:
     elif result is None:
         new_version = [sg.Text(_t("config_gui.auto_upgrade_disabled"))]
     try:
-        with open(LICENSE_FILE, "r") as file_handle:
+        with open(LICENSE_FILE, "r", encoding="utf-8") as file_handle:
             license_content = file_handle.read()
     except OSError:
         logger.info("Could not read license file.")