diff --git a/sharpener/convertor.py b/sharpener/convertor.py
index e4f4118..cd4b404 100644
--- a/sharpener/convertor.py
+++ b/sharpener/convertor.py
@@ -2,8 +2,8 @@
 
 
 
-def convert(source_file, destination_file ):
+def convert(source_file, destination_file, amount ):
     output = check_output(["convert",
                            source_file,
-                           "-sharpen","0x1",
-                           destination_file], stderr=STDOUT)
\ No newline at end of file
+                           "-sharpen", amount,
+                           destination_file], stderr=STDOUT)