diff --git a/README.rst b/README.rst
index 38c50cfe7a..df3cbebe49 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,4 @@
-Abjad 3.17
+Abjad 3.18
 ==========
 
 Abjad helps composers build up complex pieces of music notation in iterative and
diff --git a/abjad/_version.py b/abjad/_version.py
index b67ce02b03..ea5e9fb248 100644
--- a/abjad/_version.py
+++ b/abjad/_version.py
@@ -1,3 +1,3 @@
-__version_info__ = (3, 17)
+__version_info__ = (3, 18)
 __version__ = ".".join(str(_) for _ in __version_info__[:2])
 __version__ += "".join(__version_info__[2:])
diff --git a/docs/source/conf.py b/docs/source/conf.py
index 5d977cc06c..1b587b115c 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -36,7 +36,7 @@
     # navigation_depth=1 makes sidebar completely flat;
     # leave flat navigation in place forever:
     "navigation_depth": 1,
-    "style_nav_header_background": "#bb6611",
+    "style_nav_header_background": "#cc8844",
 }
 html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
 project = "Abjad"
diff --git a/setup.py b/setup.py
index 809c6bc281..2787ad5a17 100644
--- a/setup.py
+++ b/setup.py
@@ -51,15 +51,15 @@ def check_python_version(abjad_version):
 ]
 
 extras_require = {
-    "nauert": ["abjad-ext-nauert>=3.17"],
-    "rmakers": ["abjad-ext-rmakers>=3.17"],
+    "nauert": ["abjad-ext-nauert>=3.18"],
+    "rmakers": ["abjad-ext-rmakers>=3.18"],
     "dev": [
         "black>=23.3.0",
         "flake8>=6.0.0",
         "isort>=5.12.0",
-        "mypy>=1.2.0",
+        "mypy>=1.3.0",
         "pytest>=7.3.1",
-        "pytest-cov>=4.0.0",
+        "pytest-cov>=4.1.0",
         "pytest-helpers-namespace>=2021.12.29",
         "sphinx-autodoc-typehints>=1.23.0",
         "sphinx-rtd-theme>=1.0.0",