diff --git a/tgbot/shit/render.py b/tgbot/shit/render.py
index ad47748..e520c9c 100644
--- a/tgbot/shit/render.py
+++ b/tgbot/shit/render.py
@@ -79,7 +79,7 @@ def image_to_string(image_file):
 
     # Get image dimensions
     width, height = img.size
-    if width != WIDTH or HEIGHT != 9:
+    if width != WIDTH or height != HEIGHT:
         raise ValueError("The image must be exactly 22x9 pixels.")
 
     # Create the string representation