From 59eb0e2451d3516a3b09bf9628d0c6bf16b55b5e Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Wed, 26 Apr 2023 07:29:48 -0600
Subject: [PATCH 01/16] test for SSL error on linux (issue #1246)

---
 test/tst_dap.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/tst_dap.py b/test/tst_dap.py
index 7924e289b..db43926ec 100644
--- a/test/tst_dap.py
+++ b/test/tst_dap.py
@@ -35,6 +35,9 @@ def runTest(self):
         ncfile = netCDF4.Dataset(URL_https)
         assert(ncfile['sst'].long_name=='Sea Surface Temperature')    
         ncfile.close()
+        # check for SSL error on linux (issue #1246)
+        ncfile=Dataset('https://icdc.cen.uni-hamburg.de/thredds/dodsC/ftpthredds/hamtide//m2.hamtide11a.nc')
+
 
 if __name__ == '__main__':
     unittest.main()

From f31facfaf5b4154fd156ab7c451f97f7b68d0a47 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Wed, 26 Apr 2023 07:38:52 -0600
Subject: [PATCH 02/16] update

---
 test/tst_dap.py | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/test/tst_dap.py b/test/tst_dap.py
index db43926ec..46a26ae43 100644
--- a/test/tst_dap.py
+++ b/test/tst_dap.py
@@ -8,7 +8,7 @@
 
 yesterday = datetime.utcnow() - timedelta(days=1)
 URL = "http://nomads.ncep.noaa.gov/dods/gfs_1p00/gfs%s/gfs_1p00_00z" % yesterday.strftime('%Y%m%d')
-URL_https = 'https://podaac-opendap.jpl.nasa.gov/opendap/allData/modis/L3/aqua/11um/v2019.0/4km/daily/2017/365/AQUA_MODIS.20171231.L3m.DAY.NSST.sst.4km.nc'
+URL_https='https://icdc.cen.uni-hamburg.de/thredds/dodsC/ftpthredds/hamtide//m2.hamtide11a.nc'
 varname = 'hgtsfc'
 data_min = -40; data_max = 5900
 varshape = (181, 360)
@@ -33,10 +33,8 @@ def runTest(self):
         ncfile.close()
         # test https support (linked curl lib must built with openssl support)
         ncfile = netCDF4.Dataset(URL_https)
-        assert(ncfile['sst'].long_name=='Sea Surface Temperature')    
+        assert(ncfile['PHAS'].long_name=='Phase')
         ncfile.close()
-        # check for SSL error on linux (issue #1246)
-        ncfile=Dataset('https://icdc.cen.uni-hamburg.de/thredds/dodsC/ftpthredds/hamtide//m2.hamtide11a.nc')
 
 
 if __name__ == '__main__':

From 0b161e4c058489382559448df4eb93d4a6d69fcf Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 10:06:38 -0600
Subject: [PATCH 03/16] add nc_rc_set

---
 include/netCDF4.pxi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/netCDF4.pxi b/include/netCDF4.pxi
index 9233c8165..7eae57750 100644
--- a/include/netCDF4.pxi
+++ b/include/netCDF4.pxi
@@ -366,6 +366,7 @@ cdef extern from "netcdf.h":
     int nc_inq_enum_member(int ncid, nc_type xtype, int idx, char *name, void *value) nogil
 
     int nc_inq_enum_ident(int ncid, nc_type xtype, long long value, char *identifier) nogil
+    int nc_rc_set(char key, char* value) nogil
 
 IF HAS_QUANTIZATION_SUPPORT:
     cdef extern from "netcdf.h":

From 5d0130f65ec05b787d08cd3b1b5d6cadb2ce9621 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 10:07:42 -0600
Subject: [PATCH 04/16] fix typo in previous commit

---
 include/netCDF4.pxi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/netCDF4.pxi b/include/netCDF4.pxi
index 7eae57750..72b876585 100644
--- a/include/netCDF4.pxi
+++ b/include/netCDF4.pxi
@@ -366,7 +366,7 @@ cdef extern from "netcdf.h":
     int nc_inq_enum_member(int ncid, nc_type xtype, int idx, char *name, void *value) nogil
 
     int nc_inq_enum_ident(int ncid, nc_type xtype, long long value, char *identifier) nogil
-    int nc_rc_set(char key, char* value) nogil
+    int nc_rc_set(char* key, char* value) nogil
 
 IF HAS_QUANTIZATION_SUPPORT:
     cdef extern from "netcdf.h":

From 8f5334dc612d365a2ea0869724793b9c69faea86 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 13:53:38 -0600
Subject: [PATCH 05/16] use certifi and nc_rc_set to set path to ssl
 certificates

---
 src/netCDF4/_netCDF4.pyx | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/netCDF4/_netCDF4.pyx b/src/netCDF4/_netCDF4.pyx
index a0ed5e5d0..13403ed69 100644
--- a/src/netCDF4/_netCDF4.pyx
+++ b/src/netCDF4/_netCDF4.pyx
@@ -1258,6 +1258,20 @@ ELSE:
     ctypedef object Comm
     ctypedef object Info
 
+import certifi
+
+# set path to SSL certificates (issue #1246)
+cdef _set_curl_certpath(certpath):
+    cdef char *cert_path
+    cdef char *key
+    cdef int ierr
+    bytestr = _strencode(certpath)
+    cert_path = bytestr
+    ierr = nc_rc_set("HTTP.SSL.CAINFO",cert_path)
+    if ierr != 0:
+        raise RuntimeError('error setting path to SSL certificates')
+_set_curl_certpath(certifi.where())
+
 # check for required version of netcdf-4 and hdf5.
 
 def _gethdf5libversion():
@@ -1265,7 +1279,7 @@ def _gethdf5libversion():
     cdef herr_t ierr
     with nogil:
         ierr = H5get_libversion( &majorvers, &minorvers, &releasevers)
-    if ierr < 0:
+    if ierr != 0:
         raise RuntimeError('error getting HDF5 library version info')
     return '%d.%d.%d' % (majorvers,minorvers,releasevers)
 

From 8b55eeef7a4686ca13ce24a57361bfc98c5664d1 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 15:54:59 -0600
Subject: [PATCH 06/16] update

---
 Changelog                |  6 ++++++
 setup.py                 | 15 +++++++++++++--
 src/netCDF4/_netCDF4.pyx | 28 ++++++++++++++--------------
 3 files changed, 33 insertions(+), 16 deletions(-)

diff --git a/Changelog b/Changelog
index f89ab4e91..fae77aa5f 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,9 @@
+ version 1.6.4 (not yet released)
+=================================
+ * set path to SSL certificates internally, so https DAP URLs work with wheels
+   (issue #1246, requires nc_rc_set function available starting with netcdf-c 4.9.2).
+   Added certifi as a dependency.
+
  version 1.6.3 (tag v1.6.3rel)
 ==============================
  * Use ``nc_put_vars`` for strided writes for netcdf-c >= 4.6.2 (issue #1222).
diff --git a/setup.py b/setup.py
index 016e7b5b9..b72c9b2cf 100644
--- a/setup.py
+++ b/setup.py
@@ -60,6 +60,7 @@ def check_api(inc_dirs,netcdf_lib_version):
     has_blosc = False
     has_ncfilter = False
     has_set_alignment = False
+    has_nc_rc_set = False
 
     for d in inc_dirs:
         try:
@@ -83,6 +84,8 @@ def check_api(inc_dirs,netcdf_lib_version):
                 has_quantize = True
             if line.startswith('nc_set_alignment'):
                 has_set_alignment = True
+            if line.startswith('nc_rc_set'):
+                has_nc_rc_set = True
 
         if has_nc_open_mem:
             try:
@@ -150,7 +153,8 @@ def check_api(inc_dirs,netcdf_lib_version):
     return has_rename_grp, has_nc_inq_path, has_nc_inq_format_extended, \
            has_cdf5_format, has_nc_open_mem, has_nc_create_mem, \
            has_parallel4_support, has_pnetcdf_support, has_szip_support, has_quantize, \
-           has_zstandard, has_bzip2, has_blosc, has_set_alignment, has_ncfilter
+           has_zstandard, has_bzip2, has_blosc, has_set_alignment, has_ncfilter, \
+           has_nc_rc_set
 
 
 def getnetcdfvers(libdirs):
@@ -564,7 +568,7 @@ def _populate_hdf5_info(dirstosearch, inc_dirs, libs, lib_dirs):
     has_rename_grp, has_nc_inq_path, has_nc_inq_format_extended, \
     has_cdf5_format, has_nc_open_mem, has_nc_create_mem, \
     has_parallel4_support, has_pnetcdf_support, has_szip_support, has_quantize, \
-    has_zstandard, has_bzip2, has_blosc, has_set_alignment, has_ncfilter = \
+    has_zstandard, has_bzip2, has_blosc, has_set_alignment, has_ncfilter, has_nc_rc_set = \
     check_api(inc_dirs,netcdf_lib_version)
     # for netcdf 4.4.x CDF5 format is always enabled.
     if netcdf_lib_version is not None and\
@@ -686,6 +690,13 @@ def _populate_hdf5_info(dirstosearch, inc_dirs, libs, lib_dirs):
         sys.stdout.write('netcdf lib does not have nc_inq_filter_avail function\n')
         f.write('DEF HAS_NCFILTER = 0\n')
 
+    if has_nc_rc_set:
+        sys.stdout.write('netcdf lib has nc_rc_set function\n')
+        f.write('DEF HAS_NCRCSET = 1\n')
+    else:
+        sys.stdout.write('netcdf lib does not have nc_rc_set function\n')
+        f.write('DEF HAS_NCRCSET = 0\n')
+
     f.close()
 
     if has_parallel4_support or has_pnetcdf_support:
diff --git a/src/netCDF4/_netCDF4.pyx b/src/netCDF4/_netCDF4.pyx
index 13403ed69..ed6af81c1 100644
--- a/src/netCDF4/_netCDF4.pyx
+++ b/src/netCDF4/_netCDF4.pyx
@@ -1,5 +1,5 @@
 """
-Version 1.6.3
+Version 1.6.4
 -------------
 
 # Introduction
@@ -1227,7 +1227,7 @@ from .utils import (_StartCountStride, _quantize, _find_dim, _walk_grps,
                     _out_array_shape, _sortbylist, _tostr, _safecast, _is_int)
 import sys
 
-__version__ = "1.6.3"
+__version__ = "1.6.4"
 
 # Initialize numpy
 import posixpath
@@ -1258,19 +1258,19 @@ ELSE:
     ctypedef object Comm
     ctypedef object Info
 
-import certifi
-
 # set path to SSL certificates (issue #1246)
-cdef _set_curl_certpath(certpath):
-    cdef char *cert_path
-    cdef char *key
-    cdef int ierr
-    bytestr = _strencode(certpath)
-    cert_path = bytestr
-    ierr = nc_rc_set("HTTP.SSL.CAINFO",cert_path)
-    if ierr != 0:
-        raise RuntimeError('error setting path to SSL certificates')
-_set_curl_certpath(certifi.where())
+IF HAS_NCRCSET: # available starting in version 4.9.2
+    import certifi
+    cdef _set_curl_certpath(certpath):
+        cdef char *cert_path
+        cdef char *key
+        cdef int ierr
+        bytestr = _strencode(certpath)
+        cert_path = bytestr
+        ierr = nc_rc_set("HTTP.SSL.CAINFO",cert_path)
+        if ierr != 0:
+            raise RuntimeError('error setting path to SSL certificates')
+    _set_curl_certpath(certifi.where())
 
 # check for required version of netcdf-4 and hdf5.
 

From 1128c6d841764e8e2cfb516b819a43d66805dc92 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 15:59:18 -0600
Subject: [PATCH 07/16] update

---
 README.md      | 4 ++++
 pyproject.toml | 1 +
 2 files changed, 5 insertions(+)

diff --git a/README.md b/README.md
index ec55f5a5c..8ad22ee4b 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,10 @@
 ## News
 For details on the latest updates, see the [Changelog](https://github.com/Unidata/netcdf4-python/blob/master/Changelog).
 
+?/?/2023:  Version [1.6.4](https://pypi.python.org/pypi/netCDF4/1.6.4) released.  Now requires 
+[certifi](https://github.com/certifi/python-certifi) to locate SSL certificates - this allows 
+OpenDAP https URLs to work with wheels (issue [#1246)(https://github.com/Unidata/netcdf4-python/issues/1246).
+
 3/3/2023:  Version [1.6.3](https://pypi.python.org/pypi/netCDF4/1.6.3) released.
 
 11/15/2022:  Version [1.6.2](https://pypi.python.org/pypi/netCDF4/1.6.2) released. Fix for
diff --git a/pyproject.toml b/pyproject.toml
index 0060eac30..f755e1679 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,6 +42,7 @@ classifiers = [
 ]
 dependencies = [
     "cftime",
+    "certifi",
     "numpy",
 ]
 dynamic = ["version"]

From 829a665c6a587572f06cc9b23e47065cb01ad9d7 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Sun, 30 Apr 2023 16:42:12 -0600
Subject: [PATCH 08/16] build version 4.9.2

---
 .github/workflows/build_latest.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/build_latest.yml b/.github/workflows/build_latest.yml
index f7798b255..320190ddb 100644
--- a/.github/workflows/build_latest.yml
+++ b/.github/workflows/build_latest.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       PNETCDF_VERSION: 1.12.1
-      NETCDF_VERSION: 4.9.1
+      NETCDF_VERSION: 4.9.2
       NETCDF_DIR: ${{ github.workspace }}/..
       NETCDF_EXTRA_CONFIG: --enable-pnetcdf
       CC: mpicc.mpich

From a859dd1271e536cbdb8e082ad643b3fc72f2b614 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Sun, 30 Apr 2023 17:36:40 -0600
Subject: [PATCH 09/16] fix nc_rc_set test

---
 setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup.py b/setup.py
index b72c9b2cf..5bf61e16a 100644
--- a/setup.py
+++ b/setup.py
@@ -84,7 +84,7 @@ def check_api(inc_dirs,netcdf_lib_version):
                 has_quantize = True
             if line.startswith('nc_set_alignment'):
                 has_set_alignment = True
-            if line.startswith('nc_rc_set'):
+            if line.startswith('EXTERNL int nc_rc_set'):
                 has_nc_rc_set = True
 
         if has_nc_open_mem:

From 602554d63c2e1ed5c1ab17ce8d26d2b32b14242c Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Sun, 30 Apr 2023 20:53:18 -0600
Subject: [PATCH 10/16] update

---
 Changelog | 3 ++-
 README.md | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Changelog b/Changelog
index fae77aa5f..2e37e9845 100644
--- a/Changelog
+++ b/Changelog
@@ -1,7 +1,8 @@
  version 1.6.4 (not yet released)
 =================================
  * set path to SSL certificates internally, so https DAP URLs work with wheels
-   (issue #1246, requires nc_rc_set function available starting with netcdf-c 4.9.2).
+   (issue #1246, requires nc_rc_set function available starting with netcdf-c
+   4.9.2, plus bugfix in netcdf-c PR #2690).
    Added certifi as a dependency.
 
  version 1.6.3 (tag v1.6.3rel)
diff --git a/README.md b/README.md
index 8ad22ee4b..c11ca205d 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ For details on the latest updates, see the [Changelog](https://github.com/Unidat
 
 ?/?/2023:  Version [1.6.4](https://pypi.python.org/pypi/netCDF4/1.6.4) released.  Now requires 
 [certifi](https://github.com/certifi/python-certifi) to locate SSL certificates - this allows 
-OpenDAP https URLs to work with wheels (issue [#1246)(https://github.com/Unidata/netcdf4-python/issues/1246).
+OpenDAP https URLs to work with linux wheels (issue [#1246](https://github.com/Unidata/netcdf4-python/issues/1246).
 
 3/3/2023:  Version [1.6.3](https://pypi.python.org/pypi/netCDF4/1.6.3) released.
 

From 2b4f447b35eb5890986979b5f6f2c45a5e52bf42 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Mon, 1 May 2023 11:06:16 -0600
Subject: [PATCH 11/16] update docstrings, README

---
 Changelog                | 2 +-
 src/netCDF4/_netCDF4.pyx | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Changelog b/Changelog
index 2e37e9845..4d3f1025a 100644
--- a/Changelog
+++ b/Changelog
@@ -2,7 +2,7 @@
 =================================
  * set path to SSL certificates internally, so https DAP URLs work with wheels
    (issue #1246, requires nc_rc_set function available starting with netcdf-c
-   4.9.2, plus bugfix in netcdf-c PR #2690).
+   4.9.1, plus bugfix in netcdf-c PR #2690).
    Added certifi as a dependency.
 
  version 1.6.3 (tag v1.6.3rel)
diff --git a/src/netCDF4/_netCDF4.pyx b/src/netCDF4/_netCDF4.pyx
index ed6af81c1..687dafb3c 100644
--- a/src/netCDF4/_netCDF4.pyx
+++ b/src/netCDF4/_netCDF4.pyx
@@ -1259,7 +1259,7 @@ ELSE:
     ctypedef object Info
 
 # set path to SSL certificates (issue #1246)
-IF HAS_NCRCSET: # available starting in version 4.9.2
+IF HAS_NCRCSET: # available starting in version 4.9.1
     import certifi
     cdef _set_curl_certpath(certpath):
         cdef char *cert_path

From 30278275e65a2bcf3c03c9b06a03c01e586a0827 Mon Sep 17 00:00:00 2001
From: jswhit <whitaker.jeffrey@gmail.com>
Date: Mon, 1 May 2023 11:42:44 -0600
Subject: [PATCH 12/16] include certifi dependency

---
 .github/workflows/miniconda.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/miniconda.yml b/.github/workflows/miniconda.yml
index a4a463bb3..009f4266b 100644
--- a/.github/workflows/miniconda.yml
+++ b/.github/workflows/miniconda.yml
@@ -31,7 +31,7 @@ jobs:
     - name: Python ${{ matrix.python-version }}
       shell: bash -l {0}
       run: |
-        micromamba create --name TEST python=${{ matrix.python-version }} numpy cython pip pytest hdf5 libnetcdf cftime zlib --channel conda-forge
+        micromamba create --name TEST python=${{ matrix.python-version }} numpy cython pip pytest hdf5 libnetcdf cftime certifi zlib --channel conda-forge
         micromamba activate TEST
         export PATH="${CONDA_PREFIX}/bin:${CONDA_PREFIX}/Library/bin:$PATH" # so setup.py finds nc-config
         pip install -v -e . --no-deps --force-reinstall
@@ -67,7 +67,7 @@ jobs:
     - name: Python ${{ matrix.python-version }}
       shell: bash -l {0}
       run: |
-        micromamba create --name TEST python=${{ matrix.python-version }} numpy cython pip pytest mpi4py hdf5=*=mpi* libnetcdf=*=mpi* cftime zlib --channel conda-forge
+        micromamba create --name TEST python=${{ matrix.python-version }} numpy cython pip pytest mpi4py hdf5=*=mpi* libnetcdf=*=mpi* cftime certifi zlib --channel conda-forge
         micromamba activate TEST
         export PATH="${CONDA_PREFIX}/bin:${CONDA_PREFIX}/Library/bin:$PATH" # so setup.py finds nc-config
         nc-config --all

From c474baa6d2a125a0afa5b00b6182dd6b49064307 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Tue, 23 May 2023 15:45:09 -0600
Subject: [PATCH 13/16] Update tst_dap.py

---
 test/tst_dap.py | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/test/tst_dap.py b/test/tst_dap.py
index 9aeec4750..2b033e93a 100644
--- a/test/tst_dap.py
+++ b/test/tst_dap.py
@@ -7,10 +7,8 @@
 # test accessing data over http with opendap.
 
 yesterday = datetime.utcnow() - timedelta(days=1)
-
 URL = f'http://nomads.ncep.noaa.gov/dods/gfs_1p00/gfs{yesterday:%Y%m%d}/gfs_1p00_00z'
 URL_https = 'https://www.neracoos.org/erddap/griddap/WW3_EastCoast_latest'
-
 varname = 'hgtsfc'
 data_min = -40; data_max = 5900
 varshape = (181, 360)
@@ -38,6 +36,5 @@ def runTest(self):
         assert(ncfile['hs'].long_name=='Significant Wave Height')
         ncfile.close()
 
-
 if __name__ == '__main__':
     unittest.main()

From 5fb16dd50d8609dd269b7e9a938fbc9fb883e104 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Tue, 30 May 2023 09:17:30 -0600
Subject: [PATCH 14/16] add certifi dep

---
 .github/workflows/miniconda.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/miniconda.yml b/.github/workflows/miniconda.yml
index 30b336804..8db0307f1 100644
--- a/.github/workflows/miniconda.yml
+++ b/.github/workflows/miniconda.yml
@@ -30,7 +30,7 @@ jobs:
         init-shell: bash
         create-args: >-
           python=${{ matrix.python-version }}
-          numpy cython pip pytest hdf5 libnetcdf cftime zlib
+          numpy cython pip pytest hdf5 libnetcdf cftime zlib certifi
           --channel conda-forge
 
     - name: Install netcdf4-python
@@ -61,7 +61,7 @@ jobs:
         init-shell: bash
         create-args: >-
           python=${{ matrix.python-version }}
-          numpy cython pip pytest mpi4py hdf5=*=mpi* libnetcdf=*=mpi* cftime zlib
+          numpy cython pip pytest mpi4py hdf5=*=mpi* libnetcdf=*=mpi* cftime zlib certifi
           --channel conda-forge
 
     - name: Install netcdf4-python with mpi

From ddf810709687134534cae353cd92db6cea90e7c1 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Tue, 30 May 2023 09:19:42 -0600
Subject: [PATCH 15/16] update

---
 Changelog | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Changelog b/Changelog
index 44a74a395..1efad0da0 100644
--- a/Changelog
+++ b/Changelog
@@ -1,6 +1,5 @@
-
- version 1.6.4 (not yet released)
-=================================
+ version 1.6.4 (tag v1.6.4rel)
+===============================
  * set path to SSL certificates internally, so https DAP URLs work with wheels
    (issue #1246, requires nc_rc_set function available starting with netcdf-c
    4.9.1, plus bugfix in netcdf-c PR #2690).

From a79802db579acf6a69b35e902fe9eada9f30e1b6 Mon Sep 17 00:00:00 2001
From: Jeff Whitaker <jswhit@fastmail.fm>
Date: Wed, 31 May 2023 20:26:24 -0600
Subject: [PATCH 16/16] update

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index c11ca205d..2545bc101 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 ## News
 For details on the latest updates, see the [Changelog](https://github.com/Unidata/netcdf4-python/blob/master/Changelog).
 
-?/?/2023:  Version [1.6.4](https://pypi.python.org/pypi/netCDF4/1.6.4) released.  Now requires 
+6/4/2023:  Version [1.6.4](https://pypi.python.org/pypi/netCDF4/1.6.4) released.  Now requires 
 [certifi](https://github.com/certifi/python-certifi) to locate SSL certificates - this allows 
 OpenDAP https URLs to work with linux wheels (issue [#1246](https://github.com/Unidata/netcdf4-python/issues/1246).