diff --git a/pyproject.toml b/pyproject.toml
index d0d1373..4137803 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "openparse"
 description = "Streamlines the process of preparing documents for LLM's."
 readme = "README.md"
 requires-python = ">=3.8"
-version = "0.5.4"
+version = "0.5.5"
 authors = [{name = "Sergey Filimonov", email = "hello@sergey.fyi"}]
 dependencies = [
     "PyMuPDF >= 1.23.2",
diff --git a/src/openparse/types.py b/src/openparse/_types.py
similarity index 100%
rename from src/openparse/types.py
rename to src/openparse/_types.py
diff --git a/src/openparse/doc_parser.py b/src/openparse/doc_parser.py
index feefa89..4c474bc 100644
--- a/src/openparse/doc_parser.py
+++ b/src/openparse/doc_parser.py
@@ -3,7 +3,7 @@
 
 from openparse import tables, text, consts
 from openparse.pdf import Pdf
-from openparse.types import NOT_GIVEN, NotGiven
+from openparse._types import NOT_GIVEN, NotGiven
 from openparse.processing import (
     IngestionPipeline,
     BasicIngestionPipeline,
@@ -34,7 +34,7 @@ class PyMuPDFArgsDict(TypedDict, total=False):
 
 
 def _table_args_dict_to_model(
-    args_dict: Union[TableTransformersArgsDict, PyMuPDFArgsDict]
+    args_dict: Union[TableTransformersArgsDict, PyMuPDFArgsDict],
 ) -> Union[tables.TableTransformersArgs, tables.PyMuPDFArgs]:
     if args_dict["parsing_algorithm"] == "table-transformers":
         return tables.TableTransformersArgs(**args_dict)
diff --git a/src/openparse/pdf.py b/src/openparse/pdf.py
index bbed5cc..100f347 100644
--- a/src/openparse/pdf.py
+++ b/src/openparse/pdf.py
@@ -1,9 +1,9 @@
 import random
-import tempfile
+import io
 from pathlib import Path
 from typing import Iterator, List, Literal, Optional, Union, Tuple, Any
-from pydantic import BaseModel
 
+from pydantic import BaseModel
 from pdfminer.high_level import extract_pages
 from pdfminer.layout import LTPage
 from pypdf import PdfReader, PdfWriter
@@ -115,9 +115,9 @@ def to_pymupdf_doc(self):
         if not self.writer.pages:
             return fitz.open(self.file_path)
 
-        with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as tmpfile:
-            self.writer.write(tmpfile.name)
-            return fitz.open(tmpfile.name)
+        byte_stream = io.BytesIO()
+        self.writer.write(byte_stream)
+        return fitz.open(None, byte_stream)
 
     def _draw_bboxes(
         self,
diff --git a/src/openparse/version.py b/src/openparse/version.py
index e894b5d..d690686 100644
--- a/src/openparse/version.py
+++ b/src/openparse/version.py
@@ -1,4 +1,4 @@
-OPEN_PARSE_VERSION = "0.5.4"
+OPEN_PARSE_VERSION = "0.5.5"
 
 
 def version_info() -> str: