diff --git a/jupytext-1.16.4-vendor-licenses.txt b/jupytext-1.16.6-vendor-licenses.txt
similarity index 96%
rename from jupytext-1.16.4-vendor-licenses.txt
rename to jupytext-1.16.6-vendor-licenses.txt
index baf7005..da105a4 100644
--- a/jupytext-1.16.4-vendor-licenses.txt
+++ b/jupytext-1.16.6-vendor-licenses.txt
@@ -1,4 +1,4 @@
-├─ MIT: 746
+├─ MIT: 744
 ├─ ISC: 218
 ├─ BSD-3-Clause: 97
 ├─ Apache-2.0: 56
diff --git a/prepare_vendor.sh b/prepare_vendor.sh
index b266ecc..d6f81c1 100755
--- a/prepare_vendor.sh
+++ b/prepare_vendor.sh
@@ -51,7 +51,7 @@ fi
 
 echo ">>>>>> Package vendor files"
 rm -f $PKG_DIR/${PKG_NAME}-${PKG_VERSION}-vendor.tar.xz
-XZ_OPT="-9e -T$(nproc)" tar cJf $PKG_DIR/${PKG_NAME}-${PKG_VERSION}-vendor.tar.xz .package-cache
+XZ_OPT="-9e -T$(nproc)" tar cJf $PKG_DIR/${PKG_NAME}-${PKG_VERSION}-vendor.tar.xz .package-cache yarn.lock
 if [ $? -ne 0 ]; then
     echo "ERROR: vendor tarball creation failed"
     cleanup_and_exit 1
diff --git a/python-jupytext-chdir.patch b/python-jupytext-chdir.patch
deleted file mode 100644
index 1281b64..0000000
--- a/python-jupytext-chdir.patch
+++ /dev/null
@@ -1,30 +0,0 @@
-Fixes this error:
-
-_____________ ERROR at setup of test_cm_config_log_only_if_changed _____________
-
-tmp_path = PosixPath('/tmp/pytest-of-mockbuild/pytest-0/test_cm_config_log_only_if_cha0')
-
-    @pytest.fixture()
-    def cwd_tmp_path(tmp_path):
-        # Run the whole test from inside tmp_path
->       with tmp_path.cwd():
-E       TypeError: 'PosixPath' object does not support the context manager protocol
-
-/builddir/build/BUILD/python-jupytext-1.16.2-build/jupytext-1.16.2/tests/conftest.py:50: TypeError
-
---- jupytext-1.16.2/tests/conftest.py.orig	2024-05-05 16:34:48.000000000 -0600
-+++ jupytext-1.16.2/tests/conftest.py	2024-06-18 08:13:53.192133400 -0600
-@@ -1,3 +1,4 @@
-+import contextlib
- import itertools
- import os.path
- import re
-@@ -47,7 +48,7 @@ def cwd_tmpdir(tmpdir):
- @pytest.fixture()
- def cwd_tmp_path(tmp_path):
-     # Run the whole test from inside tmp_path
--    with tmp_path.cwd():
-+    with contextlib.chdir(tmp_path):
-         yield tmp_path
- 
- 
diff --git a/python-jupytext.spec b/python-jupytext.spec
index 586ec40..927efa8 100644
--- a/python-jupytext.spec
+++ b/python-jupytext.spec
@@ -5,7 +5,7 @@
 #global vsuffix d
 
 Name:           python-jupytext
-Version:        1.16.4
+Version:        1.16.6
 Release:        %autorelease
 Summary:        Save Jupyter notebooks as text documents or scripts
 
@@ -18,9 +18,6 @@ Source0:        %{giturl}/archive/v%{version}/jupytext-%{version}%{?vsuffix}.tar
 Source1:        jupytext-%{version}-vendor.tar.xz
 Source2:        jupytext-%{version}-vendor-licenses.txt
 Source3:        prepare_vendor.sh
-# Adapt to python 3.13 change in PosixPath.cwd
-# See https://github.com/mwouts/jupytext/issues/1242
-Patch:          %{name}-chdir.patch
 
 # s390x builds fail due to a bug in jupyterlab
 # https://bugzilla.redhat.com/show_bug.cgi?id=2278011
@@ -129,7 +126,6 @@ export HATCH_BUILD_HOOKS_ENABLE=true
 %pyproject_buildrequires -x docs,test,test-functional,test-integration
 
 %build
-export LC_ALL=C.UTF-8
 export HATCH_BUILD_HOOKS_ENABLE=true
 export YARN_CACHE_FOLDER="$PWD/jupyterlab/.package-cache"
 export npm_config_nodedir=%{_includedir}/node
diff --git a/sources b/sources
index fb5cfd4..29d8e05 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (jupytext-1.16.4-vendor.tar.xz) = 9af9bbb0586313750d71b04f7ed795680e05849aca7e33683dafb486256dce5cb24ab2d4b39990f9b4ed0296d2085f105e9d696b4863de16de58c585a978862d
-SHA512 (jupytext-1.16.4.tar.gz) = fe55a97fbb6ef7c0b1919ab05e3459900fdec530d497aa15d4decdd509edec5f2844c83051a0dcb1e87e5b0349a0c3e0302832e0471dc435beb0ddf10f5e48ba
+SHA512 (jupytext-1.16.6-vendor.tar.xz) = 8bc7e82624b6bf82beb6da29722f70e20f7fe1a22e15a8f65e3af8aacfc4f92e5f8c67a76e87880a25ffa75c92924670e8a075278ec7a661f966fdcda81aa3b3
+SHA512 (jupytext-1.16.6.tar.gz) = 8580678ef70b7d9fd2056b533697e807252fd7a9fe45ebdae48ee536a157a5e1a6b33cfaa7266710e5e5fb15bb1098419ed6fbadce0b5dee4ca9f2eb0040bcfd