diff --git a/.gitignore b/.gitignore
index 58dafdf..138cedf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 /PDAL-2.4.2-src.tar.gz
 /PDAL-2.4.3-src.tar.gz
 /PDAL-2.5.0-src.tar.gz
+/PDAL-2.5.1-src.tar.gz
diff --git a/PDAL.spec b/PDAL.spec
index 854fe57..995d426 100644
--- a/PDAL.spec
+++ b/PDAL.spec
@@ -8,8 +8,8 @@
 Summary:	Point Data Abstraction Library
 Name:		PDAL
 # NOTE: Re-verifiy test exclusions in %%check when updating
-Version:	2.5.0
-Release:	3%{?dist}
+Version:	2.5.1
+Release:	1%{?dist}
 # The code is licensed BSD except for:
 # - filters/private/csf/* and plugins/i3s/lepcc/* are ASL 2.0
 # - vendor/arbiter/*, plugins/nitf/io/nitflib.h and plugins/oci/io/OciWrapper.* are Expat/MIT
@@ -43,10 +43,6 @@ Patch1:		PDAL_tests.patch
 # fix build with sphinxcontrib-bibtex 2.0 (RHBZ #1921498)
 Patch2:		PDAL_sphinxconf.patch
 
-# Guard against bad return numbers, https://github.com/PDAL/PDAL/pull/3966
-# to be removed with PDAL 2.5.1
-Patch3:		PDAL_bad_return_numbers.patch
-
 BuildRequires:	boost-devel
 BuildRequires:	cmake
 BuildRequires:	eigen3-devel
@@ -250,6 +246,9 @@ sphinx-build -b html . build/html
 %license LICENSE.txt
 
 %changelog
+* Sat Feb 11 2023 Markus Neteler <neteler@mundialis.de> 2.5.1-1
+- Update to 2.5.1
+
 * Mon Feb 06 2023 Markus Neteler <neteler@mundialis.de> 2.5.0-3
 - patch to guard against bad return numbers (from upstream #3966), to be removed with PDAL 2.5.1
 
diff --git a/PDAL_sphinxconf.patch b/PDAL_sphinxconf.patch
index eef1128..98a6bfb 100644
--- a/PDAL_sphinxconf.patch
+++ b/PDAL_sphinxconf.patch
@@ -1,9 +1,11 @@
-diff -rupN --no-dereference PDAL-2.5.0-src/doc/conf.py PDAL-2.5.0-src-new/doc/conf.py
---- PDAL-2.5.0-src/doc/conf.py	2023-01-13 18:18:05.000000000 +0100
-+++ PDAL-2.5.0-src-new/doc/conf.py	2023-01-14 11:03:18.529434786 +0100
-@@ -58,6 +58,7 @@ extensions = ['breathe', 'sphinx.ext.aut
+--- PDAL-2.5.1-src.orig/doc/conf.py	2023-02-10 15:53:57.000000000 +0100
++++ PDAL-2.5.1-src/doc/conf.py	2023-02-11 14:09:20.893130476 +0100
+@@ -56,8 +56,9 @@ sys.path.insert(0, os.path.abspath('.'))
+ # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
+ extensions = ['breathe', 'sphinx.ext.autodoc',
                'sphinx.ext.mathjax', 'sphinx.ext.intersphinx',
-               'sphinxcontrib.bibtex', 'embed']
+-              'sphinxcontrib.bibtex', 'embed','notfound.extension']
++              'sphinxcontrib.bibtex', 'embed']
  
 +bibtex_bibfiles = ['bibliography.bib']
  
diff --git a/sources b/sources
index c8f18c3..5a10a09 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (PDAL-2.5.0-src.tar.gz) = 10545ad44efbb7a654d596d4a861a81177d61a602ff8425965def5dd99e1595a7873c741f99eefcd7ae5dc7f438b321b51399db3b33fb8eddf46bec8394472b4
+SHA512 (PDAL-2.5.1-src.tar.gz) = 8763a774cdc1dacc5a8f73e4ef32d38fc4eb02d228eeef33999c080d862c60df5161c0ae18f8242e63dbcad368fb0d69357d012659c89ce1f7d308eec2b2811a