diff --git a/backend/open_webui/models/users.py b/backend/open_webui/models/users.py
index bb12ed8..e5c37f2 100644
--- a/backend/open_webui/models/users.py
+++ b/backend/open_webui/models/users.py
@@ -395,9 +395,9 @@ class UsersTable:
 
         bbox = font.getbbox(letter)
         text_width = bbox[2] - bbox[0]
-        text_height = bbox[3] - bbox[1]
-        position = ((size[0] - text_width) // 2, (size[1] - text_height) // 2)
-        draw.text(position, letter, font=font, fill=text_color)
+        x = (size[0] - text_width) // 2
+        y = (size[1] - bbox[1]) // 2  # Poprawione obliczenie pozycji y
+        draw.text((x, y), letter, font=font, fill=text_color)
         
         buffered = io.BytesIO()
         image.save(buffered, format="PNG")