diff --git a/docling/document_converter.py b/docling/document_converter.py
index 17acf110..0884cc58 100644
--- a/docling/document_converter.py
+++ b/docling/document_converter.py
@@ -188,11 +188,7 @@ class DocumentConverter:
 
     def _get_pipeline_options_hash(self, pipeline_options: PipelineOptions) -> str:
         """Generate a hash of pipeline options to use as part of the cache key."""
-        options_str = str(
-            pipeline_options.model_dump()
-            if hasattr(pipeline_options, "model_dump")
-            else pipeline_options
-        )
+        options_str = str(pipeline_options.model_dump())
         return hashlib.md5(options_str.encode("utf-8")).hexdigest()
 
     def initialize_pipeline(self, format: InputFormat):