diff --git a/koans/lib.py b/koans/lib.py
index 8d94582..0b0582a 100644
--- a/koans/lib.py
+++ b/koans/lib.py
@@ -9,7 +9,7 @@ def minify(content: str, maxlength: int, strip: Optional[str] = ' ', newlines: s
         content = content.strip(strip)
 
     if len(content) > maxlength:
-        new_content = content[maxlength-3] + '...'
+        new_content = content[:maxlength-3] + '...'
     else:
         new_content = content
     return new_content