diff --git a/NEWS.rst b/NEWS.rst
index 921a4e6a3c109d483eabe06197e26d954821c1f8_TkVXUy5yc3Q=..13065fe2a4d0c913f8f12ea15ff51bec52c94232_TkVXUy5yc3Q= 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -2,6 +2,12 @@
 Changelog
 =========
 
+17.0.1.4.0
+----------
+
+Remove pypdf compatibility code to use Odoo pypdf compatibility instead.
+Requires a Odoo with `[ADD] *: pypdf 3.x compatibility <https://github.com/odoo/odoo/commit/fddf53c9b6bcaea1a9ff7e041c0ccbb65a4647c8>`_.
+
 17.0.1.3.2
 ----------
 
diff --git a/__manifest__.py b/__manifest__.py
index 921a4e6a3c109d483eabe06197e26d954821c1f8_X19tYW5pZmVzdF9fLnB5..13065fe2a4d0c913f8f12ea15ff51bec52c94232_X19tYW5pZmVzdF9fLnB5 100644
--- a/__manifest__.py
+++ b/__manifest__.py
@@ -21,7 +21,7 @@
 {
     "name": "Redner",
     "license": "AGPL-3",
-    "version": "17.0.1.3.2",
+    "version": "17.0.1.4.0",
     "category": "Reporting",
     "author": "XCG Consulting",
     "website": "https://orbeet.io/",
diff --git a/models/redner_report.py b/models/redner_report.py
index 921a4e6a3c109d483eabe06197e26d954821c1f8_bW9kZWxzL3JlZG5lcl9yZXBvcnQucHk=..13065fe2a4d0c913f8f12ea15ff51bec52c94232_bW9kZWxzL3JlZG5lcl9yZXBvcnQucHk= 100644
--- a/models/redner_report.py
+++ b/models/redner_report.py
@@ -1,7 +1,7 @@
 ##############################################################################
 #
 #    Redner Odoo module
-#    Copyright © 2016, 2024 XCG Consulting <https://xcg-consulting.fr>
+#    Copyright © 2016, 2024, 2025 XCG Consulting <https://xcg-consulting.fr>
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
@@ -30,9 +30,10 @@
 
 from odoo import _, api, fields, models  # type: ignore[import-untyped]
 from odoo.exceptions import ValidationError  # type: ignore[import-untyped]
+from odoo.tools.pdf import PdfFileReader, PdfFileWriter  # type: ignore[import-untyped]
 
 from ..utils import formats  # type: ignore[import-untyped]
 from ..utils.formats import Formats  # type: ignore[import-untyped]
 
 logger = logging.getLogger(__name__)
 
@@ -33,17 +34,9 @@
 
 from ..utils import formats  # type: ignore[import-untyped]
 from ..utils.formats import Formats  # type: ignore[import-untyped]
 
 logger = logging.getLogger(__name__)
 
-_pypdf2 = False
-try:
-    from pypdf import PdfWriter
-except ImportError:
-    from PyPDF2 import PdfFileReader, PdfFileWriter
-
-    _pypdf2 = True
-
 
 class RednerReport(models.TransientModel):
     _name = "redner.report"
@@ -134,8 +127,8 @@
         return result_path
 
     @api.model
-    def _merge_pdf(self, reports_path):
+    def _merge_pdf(self, reports_path: list[str]):
         """Merge PDF files into one.
         :param reports_path: list of path of pdf files
         :returns: path of the merged pdf
         """
@@ -138,6 +131,8 @@
         """Merge PDF files into one.
         :param reports_path: list of path of pdf files
         :returns: path of the merged pdf
         """
-        writer = PdfFileWriter() if _pypdf2 else PdfWriter()
+        # unlike odoo.tool.pdf.merge_pdf, does not store both files to merge and
+        # merged files in memory; only the merged file and a single file.
+        writer = PdfFileWriter()
         for path in reports_path:
@@ -143,4 +138,4 @@
         for path in reports_path:
-            if _pypdf2:
-                reader = PdfFileReader(path)
+            with open(path) as fd:
+                reader = PdfFileReader(fd, strict=False)
                 writer.appendPagesFromReader(reader)
@@ -146,6 +141,4 @@
                 writer.appendPagesFromReader(reader)
-            else:
-                writer.append(path)
         merged_file_fd, merged_file_path = tempfile.mkstemp(
             suffix=".pdf", prefix="report.merged.tmp."
         )