diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index 2bdc040..c20d217 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -36,6 +36,7 @@
 set -x
 
 if [[ $ID == macos ]]; then
+    export HOMEBREW_NO_ENV_HINTS=1
     if [[ -n $GITHUB_ACTIONS ]]; then
         export HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK=1
     fi
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 5e19027..d9f3156 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,21 @@
 # Release Notes
 
+## Version 0.5.6
+
+- The build dependencies have been increased as follows:
+
+  - GCC >= 9.3 or Clang >= 7.0 are strongly recommended on Linux; GCC 8.x is also known
+    to work but is not officially supported
+  - Xcode 13 or later is recommended on macOS; older versions may still work but are not
+    officially supported
+  - Boost >= 1.71.0 and ndn-cxx >= 0.9.0 are required on all platforms
+
+- Fix compilation against the latest version of ndn-cxx
+
+- Fix building the documentation with Python 3.12
+
+- Upgrade `waf` to version 2.0.27
+
 ## Version 0.5.5
 
 - The minimum build requirements have been increased as follows:
diff --git a/docs/conf.py b/docs/conf.py
index fbc6722..899e87b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -48,7 +48,7 @@
 addExtensionIfExists('sphinxcontrib.doxylink')
 
 templates_path = ['_templates']
-exclude_patterns = ['Thumbs.db', '.DS_Store', 'RELEASE_NOTES.rst']
+exclude_patterns = ['Thumbs.db', '.DS_Store']
 
 
 # -- Options for HTML output -------------------------------------------------
diff --git a/docs/doxygen.conf.in b/docs/doxygen.conf.in
index 0cbb0c5..d2f5669 100644
--- a/docs/doxygen.conf.in
+++ b/docs/doxygen.conf.in
@@ -1171,15 +1171,6 @@
 
 HTML_COLORSTYLE_GAMMA  = 91
 
-# If the HTML_TIMESTAMP tag is set to YES then the footer of each generated HTML
-# page will contain the date and time when the page was generated. Setting this
-# to YES can help to show when doxygen was last run and thus if the
-# documentation is up to date.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_HTML is set to YES.
-
-HTML_TIMESTAMP         = NO
-
 # If the HTML_DYNAMIC_SECTIONS tag is set to YES then the generated HTML
 # documentation will contain sections that can be hidden and shown after the
 # page has loaded.
@@ -1747,14 +1738,6 @@
 
 LATEX_BIB_STYLE        = plain
 
-# If the LATEX_TIMESTAMP tag is set to YES then the footer of each generated
-# page will contain the date and time when the page was generated. Setting this
-# to NO can help when comparing the output of multiple runs.
-# The default value is: NO.
-# This tag requires that the tag GENERATE_LATEX is set to YES.
-
-LATEX_TIMESTAMP        = NO
-
 #---------------------------------------------------------------------------
 # Configuration options related to the RTF output
 #---------------------------------------------------------------------------
@@ -2088,15 +2071,6 @@
 # Configuration options related to the dot tool
 #---------------------------------------------------------------------------
 
-# If the CLASS_DIAGRAMS tag is set to YES, doxygen will generate a class diagram
-# (in HTML and LaTeX) for classes with base or super classes. Setting the tag to
-# NO turns the diagrams off. Note that this option also works with HAVE_DOT
-# disabled, but it is recommended to install and use dot, since it yields more
-# powerful graphs.
-# The default value is: YES.
-
-CLASS_DIAGRAMS         = YES
-
 # You can include diagrams made with dia in doxygen documentation. Doxygen will
 # then run dia to produce the diagram and insert it in the documentation. The
 # DIA_PATH tag allows you to specify the directory where the dia binary resides.
@@ -2129,23 +2103,6 @@
 
 DOT_NUM_THREADS        = 0
 
-# When you want a differently looking font in the dot files that doxygen
-# generates you can specify the font name using DOT_FONTNAME. You need to make
-# sure dot is able to find the font, which can be done by putting it in a
-# standard location or by setting the DOTFONTPATH environment variable or by
-# setting DOT_FONTPATH to the directory containing the font.
-# The default value is: Helvetica.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_FONTNAME           = Helvetica
-
-# The DOT_FONTSIZE tag can be used to set the size (in points) of the font of
-# dot graphs.
-# Minimum value: 4, maximum value: 24, default value: 10.
-# This tag requires that the tag HAVE_DOT is set to YES.
-
-DOT_FONTSIZE           = 10
-
 # By default doxygen will tell dot to use the default font as specified with
 # DOT_FONTNAME. If you specify a different font using DOT_FONTNAME you can set
 # the path where dot can find it using this tag.
diff --git a/wscript b/wscript
index 0249c0d..bae5eaf 100644
--- a/wscript
+++ b/wscript
@@ -4,7 +4,7 @@
 import subprocess
 from waflib import Context, Logs
 
-VERSION = '0.5.5'
+VERSION = '0.5.6'
 APPNAME = 'ChronoSync'
 GIT_TAG_PREFIX = ''
 
@@ -34,7 +34,7 @@
     conf.find_program(['pkgconf', 'pkg-config'], var='PKGCONFIG')
 
     pkg_config_path = os.environ.get('PKG_CONFIG_PATH', f'{conf.env.LIBDIR}/pkgconfig')
-    conf.check_cfg(package='libndn-cxx', args=['libndn-cxx >= 0.8.1', '--cflags', '--libs'],
+    conf.check_cfg(package='libndn-cxx', args=['libndn-cxx >= 0.9.0', '--cflags', '--libs'],
                    uselib_store='NDN_CXX', pkg_config_path=pkg_config_path)
 
     conf.check_boost(lib='iostreams', mt=True)