diff --git a/.gitattributes b/.gitattributes
index 3c5369a..ce3f295 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1 @@
-*.html  linguist-vendored=true
\ No newline at end of file
+*.html  linguist-vendored=true
diff --git a/pwhtmltopdf/abc.py b/pwhtmltopdf/abc.py
index 8f3fe45..1ec7662 100644
--- a/pwhtmltopdf/abc.py
+++ b/pwhtmltopdf/abc.py
@@ -8,7 +8,7 @@
 from pwhtmltopdf.types import StrPath, StrPathLike
 
 
-class BaseHTP:
+class BaseHTP(abc.ABC):
     def __init__(self, static_root: StrPath = None):
         """
         param static_root: The resource directory in html, which is passed in for subsequent rendering