diff --git a/.github/workflows/standards-and-tests.yml b/.github/workflows/standards-and-tests.yml
index d17254d..1815c46 100644
--- a/.github/workflows/standards-and-tests.yml
+++ b/.github/workflows/standards-and-tests.yml
@@ -1,11 +1,11 @@
 name: Run Standards & Tests
 on:
   push:
-    branches: [ dev, master ]
+    branches: [dev, master]
     tags:
       - '*.*.*'
   pull_request:
-    branches: [ dev ]
+    branches: [dev]
 jobs:
   tests:
     runs-on: ${{ matrix.os }}
@@ -13,14 +13,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ 7.4, 8.0 ]
-        os: [ ubuntu-20.04 ]
-        wordpress: [ 6.0.3, latest ]
+        php: [8.0, 8.1]
+        os: [ubuntu-20.04]
+        wordpress: [6.1.1, latest]
         include:
           - experimental: true
           - experimental: false
             php: 8.0
-            wordpress: 6.0.3
+            wordpress: 6.1.1
 
     name: Test - PHP ${{ matrix.php }} - WP ${{ matrix.wordpress }}
 
diff --git a/README.md b/README.md
index 658fca0..d275e61 100644
--- a/README.md
+++ b/README.md
@@ -10,10 +10,10 @@
 
 Contributors: conner_bw, greatislander, steelwagstaff
 Tags: publishing, catalog, pressbooks, default-theme
-Requires at least: 6.0.3 
-Tested up to: 6.0.3 
-Stable tag: 1.17.0
-Requires PHP: 7.4
+Requires at least: 6.1.1 
+Tested up to: 6.1.1 
+Stable tag: 1.18.0
+Requires PHP: 8.0
 License: GNU General Public License v3 or later 
 License URI: https://www.gnu.org/licenses/gpl-3.0.html
 
@@ -31,29 +31,29 @@ Aldine is the default theme for the home page of [Pressbooks](https://pressbooks
 
 ## Changelog
 
-### 1.17.0
+### 1.18.0
 
-* See: https://github.com/pressbooks/pressbooks-aldine/releases/tag/1.17.0
+* See: https://github.com/pressbooks/pressbooks-aldine/releases/tag/1.18.0
 * Full release history available at: https://github.com/pressbooks/pressbooks-aldine/releases
 
-## Upgrade Notice
+## Upgrade Notices
 
-### 1.14.1
+### Aldine 1.18.0
+* Aldine requires PHP >= 8.0
+* Aldine requires WordPress >= 6.1.1
+* Aldine requires Pressbooks >= 6.4.0
 
-- Aldine requires Pressbooks >= 5.34.1
+### Aldine 1.14.1
+* Aldine requires Pressbooks >= 5.34.1
 
 ### 1.14.0
-
-- Aldine requires Pressbooks >= 5.33.0
+* Aldine requires Pressbooks >= 5.33.0
 
 ### 1.13.0
-
-- Aldine requires Pressbooks >= 5.32.0
+* Aldine requires Pressbooks >= 5.32.0
 
 ### 1.8.3
-
-- Aldine requires Pressbooks >= 5.17.0
+* Aldine requires Pressbooks >= 5.17.0
 
 ## Credits
-
 - Based on [Underscores](https://underscores.me/), (C) 2012-2017 Automattic, Inc., [GPLv2 or later](https://www.gnu.org/licenses/gpl-2.0.html)
diff --git a/composer.json b/composer.json
index f4e2acc..184f50f 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
 		}
 	},
 	"require": {
-		"php": "^7.4|8.0.*",
+		"php": "^8.0",
 		"composer/installers": "^2",
 		"phpcompatibility/php-compatibility": "^9.3",
 		"pressbooks/mix": "^2.1",
diff --git a/composer.lock b/composer.lock
index bb10d07..2d6da64 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "bca254bf292cf20628d024e2b7bf1d91",
+    "content-hash": "080fb35768a8645b9f6605faaadcb9c7",
     "packages": [
         {
             "name": "composer/installers",
@@ -312,16 +312,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.5.8",
+            "version": "3.7.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "9d583721a7157ee997f235f327de038e7ea6dac4"
+                "reference": "1359e176e9307e906dc3d890bcc9603ff6d90619"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/9d583721a7157ee997f235f327de038e7ea6dac4",
-                "reference": "9d583721a7157ee997f235f327de038e7ea6dac4",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/1359e176e9307e906dc3d890bcc9603ff6d90619",
+                "reference": "1359e176e9307e906dc3d890bcc9603ff6d90619",
                 "shasum": ""
             },
             "require": {
@@ -364,7 +364,7 @@
                 "source": "https://github.com/squizlabs/PHP_CodeSniffer",
                 "wiki": "https://github.com/squizlabs/PHP_CodeSniffer/wiki"
             },
-            "time": "2020-10-23T02:01:07+00:00"
+            "time": "2022-06-18T07:21:10+00:00"
         }
     ],
     "packages-dev": [
@@ -616,16 +616,16 @@
         },
         {
             "name": "humanmade/coding-standards",
-            "version": "v1.1.3",
+            "version": "v1.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/humanmade/coding-standards.git",
-                "reference": "6efe4b8fd33c22f06febc658c805acdc1e4d94f5"
+                "reference": "4b5aca25cb350f248f1797beed100edda9f32a0d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/humanmade/coding-standards/zipball/6efe4b8fd33c22f06febc658c805acdc1e4d94f5",
-                "reference": "6efe4b8fd33c22f06febc658c805acdc1e4d94f5",
+                "url": "https://api.github.com/repos/humanmade/coding-standards/zipball/4b5aca25cb350f248f1797beed100edda9f32a0d",
+                "reference": "4b5aca25cb350f248f1797beed100edda9f32a0d",
                 "shasum": ""
             },
             "require": {
@@ -634,11 +634,11 @@
                 "fig-r/psr2r-sniffer": "^0.5.0",
                 "php": ">=7.1",
                 "phpcompatibility/phpcompatibility-wp": "^2.0.0",
-                "squizlabs/php_codesniffer": "~3.5.0",
-                "wp-coding-standards/wpcs": "2.2.1"
+                "squizlabs/php_codesniffer": "~3.5",
+                "wp-coding-standards/wpcs": "2.3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^5.7"
+                "phpunit/phpunit": "^7"
             },
             "type": "phpcodesniffer-standard",
             "notification-url": "https://packagist.org/downloads/",
@@ -648,9 +648,9 @@
             "description": "Human Made Coding Standards",
             "support": {
                 "issues": "https://github.com/humanmade/coding-standards/issues",
-                "source": "https://github.com/humanmade/coding-standards/tree/v1.1.3"
+                "source": "https://github.com/humanmade/coding-standards/tree/v1.2.1"
             },
-            "time": "2021-02-03T22:20:56+00:00"
+            "time": "2022-09-14T09:35:02+00:00"
         },
         {
             "name": "myclabs/deep-copy",
@@ -713,16 +713,16 @@
         },
         {
             "name": "nikic/php-parser",
-            "version": "v4.14.0",
+            "version": "v4.15.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "34bea19b6e03d8153165d8f30bba4c3be86184c1"
+                "reference": "f59bbe44bf7d96f24f3e2b4ddc21cd52c1d2adbc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/34bea19b6e03d8153165d8f30bba4c3be86184c1",
-                "reference": "34bea19b6e03d8153165d8f30bba4c3be86184c1",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/f59bbe44bf7d96f24f3e2b4ddc21cd52c1d2adbc",
+                "reference": "f59bbe44bf7d96f24f3e2b4ddc21cd52c1d2adbc",
                 "shasum": ""
             },
             "require": {
@@ -763,9 +763,9 @@
             ],
             "support": {
                 "issues": "https://github.com/nikic/PHP-Parser/issues",
-                "source": "https://github.com/nikic/PHP-Parser/tree/v4.14.0"
+                "source": "https://github.com/nikic/PHP-Parser/tree/v4.15.2"
             },
-            "time": "2022-05-31T20:59:12+00:00"
+            "time": "2022-11-12T15:38:23+00:00"
         },
         {
             "name": "phar-io/manifest",
@@ -880,16 +880,16 @@
         },
         {
             "name": "phpcompatibility/phpcompatibility-paragonie",
-            "version": "1.3.1",
+            "version": "1.3.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCompatibility/PHPCompatibilityParagonie.git",
-                "reference": "ddabec839cc003651f2ce695c938686d1086cf43"
+                "reference": "bba5a9dfec7fcfbd679cfaf611d86b4d3759da26"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityParagonie/zipball/ddabec839cc003651f2ce695c938686d1086cf43",
-                "reference": "ddabec839cc003651f2ce695c938686d1086cf43",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityParagonie/zipball/bba5a9dfec7fcfbd679cfaf611d86b4d3759da26",
+                "reference": "bba5a9dfec7fcfbd679cfaf611d86b4d3759da26",
                 "shasum": ""
             },
             "require": {
@@ -926,26 +926,27 @@
                 "paragonie",
                 "phpcs",
                 "polyfill",
-                "standards"
+                "standards",
+                "static analysis"
             ],
             "support": {
                 "issues": "https://github.com/PHPCompatibility/PHPCompatibilityParagonie/issues",
                 "source": "https://github.com/PHPCompatibility/PHPCompatibilityParagonie"
             },
-            "time": "2021-02-15T10:24:51+00:00"
+            "time": "2022-10-25T01:46:02+00:00"
         },
         {
             "name": "phpcompatibility/phpcompatibility-wp",
-            "version": "2.1.3",
+            "version": "2.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCompatibility/PHPCompatibilityWP.git",
-                "reference": "d55de55f88697b9cdb94bccf04f14eb3b11cf308"
+                "reference": "b6c1e3ee1c35de6c41a511d5eb9bd03e447480a5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityWP/zipball/d55de55f88697b9cdb94bccf04f14eb3b11cf308",
-                "reference": "d55de55f88697b9cdb94bccf04f14eb3b11cf308",
+                "url": "https://api.github.com/repos/PHPCompatibility/PHPCompatibilityWP/zipball/b6c1e3ee1c35de6c41a511d5eb9bd03e447480a5",
+                "reference": "b6c1e3ee1c35de6c41a511d5eb9bd03e447480a5",
                 "shasum": ""
             },
             "require": {
@@ -980,260 +981,34 @@
                 "compatibility",
                 "phpcs",
                 "standards",
+                "static analysis",
                 "wordpress"
             ],
             "support": {
                 "issues": "https://github.com/PHPCompatibility/PHPCompatibilityWP/issues",
                 "source": "https://github.com/PHPCompatibility/PHPCompatibilityWP"
             },
-            "time": "2021-12-30T16:37:40+00:00"
-        },
-        {
-            "name": "phpdocumentor/reflection-common",
-            "version": "2.2.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
-                "reference": "1d01c49d4ed62f25aa84a747ad35d5a16924662b"
-            },
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-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/1d01c49d4ed62f25aa84a747ad35d5a16924662b",
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-            },
-            "require": {
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-            },
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-                }
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-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
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-            ],
-            "authors": [
-                {
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-                    "email": "opensource@ijaap.nl"
-                }
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-            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
-            "homepage": "http://www.phpdoc.org",
-            "keywords": [
-                "FQSEN",
-                "phpDocumentor",
-                "phpdoc",
-                "reflection",
-                "static analysis"
-            ],
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-                "source": "https://github.com/phpDocumentor/ReflectionCommon/tree/2.x"
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-            "version": "5.3.0",
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-                }
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-                }
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-            "description": "Highly opinionated mocking framework for PHP 5.3+",
-            "homepage": "https://github.com/phpspec/prophecy",
-            "keywords": [
-                "Double",
-                "Dummy",
-                "fake",
-                "mock",
-                "spy",
-                "stub"
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-                "source": "https://github.com/phpspec/prophecy/tree/v1.15.0"
-            },
-            "time": "2021-12-08T12:19:24+00:00"
+            "time": "2022-10-24T09:00:36+00:00"
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             "name": "phpunit/php-code-coverage",
-            "version": "9.2.15",
+            "version": "9.2.18",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "2e9da11878c4202f97915c1cb4bb1ca318a63f5f"
+                "reference": "12fddc491826940cf9b7e88ad9664cf51f0f6d0a"
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-                "reference": "2e9da11878c4202f97915c1cb4bb1ca318a63f5f",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/12fddc491826940cf9b7e88ad9664cf51f0f6d0a",
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                 "ext-libxml": "*",
                 "ext-xmlwriter": "*",
-                "nikic/php-parser": "^4.13.0",
+                "nikic/php-parser": "^4.14",
                 "php": ">=7.3",
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                 "phpunit/php-text-template": "^2.0.2",
@@ -1282,7 +1057,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.15"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.18"
             },
             "funding": [
                 {
@@ -1290,7 +1065,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2022-03-07T09:28:20+00:00"
+            "time": "2022-10-27T13:35:33+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1535,16 +1310,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.21",
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@@ -2524,16 +2299,16 @@
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@@ -2787,20 +2505,20 @@
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-            "time": "2020-02-04T02:52:06+00:00"
+            "time": "2020-05-13T23:57:56+00:00"
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                 "url": "https://github.com/Yoast/PHPUnit-Polyfills.git",
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@@ -2808,7 +2526,7 @@
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@@ -2848,7 +2566,7 @@
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-            "time": "2021-11-23T01:37:03+00:00"
+            "time": "2022-11-16T09:07:52+00:00"
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@@ -2857,7 +2575,7 @@
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diff --git a/phpcs.ruleset.xml b/phpcs.ruleset.xml
index 1154c55..01e26fa 100644
--- a/phpcs.ruleset.xml
+++ b/phpcs.ruleset.xml
@@ -16,5 +16,5 @@
     </rule>
 	<!-- Run against the PHPCompatibility ruleset -->
 	<rule ref="PHPCompatibility"/>
-	<config name="testVersion" value="7.3-7.4"/>
+	<config name="testVersion" value="8.0-8.1"/>
 </ruleset>
diff --git a/style.css b/style.css
index 81ce436..662649a 100644
--- a/style.css
+++ b/style.css
@@ -5,10 +5,10 @@ Author:				Pressbooks (Book Oven Inc.)
 Author URI:			https://pressbooks.org
 Description:		Aldine is the default theme for the home page of Pressbooks networks. It is named for the Aldine Press, founded by Aldus Manutius in 1494, who is regarded by many as the world’s first publisher.
 Tags:				publishing, catalog, pressbooks, default-theme
-Version:			1.17.0
-Requires at least:	6.0.3
-Tested up to:		6.0.3
-Requires PHP:		7.4
+Version:			1.18.0
+Requires at least:	6.1.1
+Tested up to:		6.1.1
+Requires PHP:		8.0
 License:			GNU GPL v3 or later
 License URI:		https://github.com/pressbooks/pressbooks-aldine/tree/master/LICENSE.md
 Text Domain:		pressbooks-aldine