diff --git a/composer.json b/composer.json
index 194e776..e57edc5 100644
--- a/composer.json
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diff --git a/composer.lock b/composer.lock
index 632aaf2..e75c028 100644
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                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.10"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/9.2.15"
             },
             "funding": [
                 {
@@ -1208,7 +1275,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-12-05T09:12:13+00:00"
+            "time": "2022-03-07T09:28:20+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1453,16 +1520,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.10",
+            "version": "9.5.20",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "c814a05837f2edb0d1471d6e3f4ab3501ca3899a"
+                "reference": "12bc8879fb65aef2138b26fc633cb1e3620cffba"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/c814a05837f2edb0d1471d6e3f4ab3501ca3899a",
-                "reference": "c814a05837f2edb0d1471d6e3f4ab3501ca3899a",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/12bc8879fb65aef2138b26fc633cb1e3620cffba",
+                "reference": "12bc8879fb65aef2138b26fc633cb1e3620cffba",
                 "shasum": ""
             },
             "require": {
@@ -1478,7 +1545,7 @@
                 "phar-io/version": "^3.0.2",
                 "php": ">=7.3",
                 "phpspec/prophecy": "^1.12.1",
-                "phpunit/php-code-coverage": "^9.2.7",
+                "phpunit/php-code-coverage": "^9.2.13",
                 "phpunit/php-file-iterator": "^3.0.5",
                 "phpunit/php-invoker": "^3.1.1",
                 "phpunit/php-text-template": "^2.0.3",
@@ -1492,7 +1559,7 @@
                 "sebastian/global-state": "^5.0.1",
                 "sebastian/object-enumerator": "^4.0.3",
                 "sebastian/resource-operations": "^3.0.3",
-                "sebastian/type": "^2.3.4",
+                "sebastian/type": "^3.0",
                 "sebastian/version": "^3.0.2"
             },
             "require-dev": {
@@ -1513,11 +1580,11 @@
                 }
             },
             "autoload": {
-                "classmap": [
-                    "src/"
-                ],
                 "files": [
                     "src/Framework/Assert/Functions.php"
+                ],
+                "classmap": [
+                    "src/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1540,11 +1607,11 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.10"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.20"
             },
             "funding": [
                 {
-                    "url": "https://phpunit.de/donate.html",
+                    "url": "https://phpunit.de/sponsors.html",
                     "type": "custom"
                 },
                 {
@@ -1552,7 +1619,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-09-25T07:38:51+00:00"
+            "time": "2022-04-01T12:37:26+00:00"
         },
         {
             "name": "sebastian/cli-parser",
@@ -1920,16 +1987,16 @@
         },
         {
             "name": "sebastian/environment",
-            "version": "5.1.3",
+            "version": "5.1.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/environment.git",
-                "reference": "388b6ced16caa751030f6a69e588299fa09200ac"
+                "reference": "1b5dff7bb151a4db11d49d90e5408e4e938270f7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/388b6ced16caa751030f6a69e588299fa09200ac",
-                "reference": "388b6ced16caa751030f6a69e588299fa09200ac",
+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/1b5dff7bb151a4db11d49d90e5408e4e938270f7",
+                "reference": "1b5dff7bb151a4db11d49d90e5408e4e938270f7",
                 "shasum": ""
             },
             "require": {
@@ -1971,7 +2038,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/environment/issues",
-                "source": "https://github.com/sebastianbergmann/environment/tree/5.1.3"
+                "source": "https://github.com/sebastianbergmann/environment/tree/5.1.4"
             },
             "funding": [
                 {
@@ -1979,7 +2046,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2020-09-28T05:52:38+00:00"
+            "time": "2022-04-03T09:37:03+00:00"
         },
         {
             "name": "sebastian/exporter",
@@ -2060,16 +2127,16 @@
         },
         {
             "name": "sebastian/global-state",
-            "version": "5.0.3",
+            "version": "5.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/global-state.git",
-                "reference": "23bd5951f7ff26f12d4e3242864df3e08dec4e49"
+                "reference": "0ca8db5a5fc9c8646244e629625ac486fa286bf2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/23bd5951f7ff26f12d4e3242864df3e08dec4e49",
-                "reference": "23bd5951f7ff26f12d4e3242864df3e08dec4e49",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/0ca8db5a5fc9c8646244e629625ac486fa286bf2",
+                "reference": "0ca8db5a5fc9c8646244e629625ac486fa286bf2",
                 "shasum": ""
             },
             "require": {
@@ -2112,7 +2179,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/global-state/issues",
-                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.3"
+                "source": "https://github.com/sebastianbergmann/global-state/tree/5.0.5"
             },
             "funding": [
                 {
@@ -2120,7 +2187,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-06-11T13:31:12+00:00"
+            "time": "2022-02-14T08:28:10+00:00"
         },
         {
             "name": "sebastian/lines-of-code",
@@ -2411,28 +2478,28 @@
         },
         {
             "name": "sebastian/type",
-            "version": "2.3.4",
+            "version": "3.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/type.git",
-                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914"
+                "reference": "b233b84bc4465aff7b57cf1c4bc75c86d00d6dad"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/b8cd8a1c753c90bc1a0f5372170e3e489136f914",
-                "reference": "b8cd8a1c753c90bc1a0f5372170e3e489136f914",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/b233b84bc4465aff7b57cf1c4bc75c86d00d6dad",
+                "reference": "b233b84bc4465aff7b57cf1c4bc75c86d00d6dad",
                 "shasum": ""
             },
             "require": {
                 "php": ">=7.3"
             },
             "require-dev": {
-                "phpunit/phpunit": "^9.3"
+                "phpunit/phpunit": "^9.5"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.3-dev"
+                    "dev-master": "3.0-dev"
                 }
             },
             "autoload": {
@@ -2455,7 +2522,7 @@
             "homepage": "https://github.com/sebastianbergmann/type",
             "support": {
                 "issues": "https://github.com/sebastianbergmann/type/issues",
-                "source": "https://github.com/sebastianbergmann/type/tree/2.3.4"
+                "source": "https://github.com/sebastianbergmann/type/tree/3.0.0"
             },
             "funding": [
                 {
@@ -2463,7 +2530,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-06-15T12:49:02+00:00"
+            "time": "2022-03-15T09:54:48+00:00"
         },
         {
             "name": "sebastian/version",
@@ -2520,16 +2587,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "3.6.2",
+            "version": "3.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "5e4e71592f69da17871dba6e80dd51bce74a351a"
+                "reference": "a2cd51b45bcaef9c1f2a4bda48f2dd2fa2b95563"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/5e4e71592f69da17871dba6e80dd51bce74a351a",
-                "reference": "5e4e71592f69da17871dba6e80dd51bce74a351a",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/a2cd51b45bcaef9c1f2a4bda48f2dd2fa2b95563",
+                "reference": "a2cd51b45bcaef9c1f2a4bda48f2dd2fa2b95563",
                 "shasum": ""
             },
             "require": {
@@ -2572,86 +2639,7 @@
                 "source": "https://github.com/squizlabs/PHP_CodeSniffer",
                 "wiki": "https://github.com/squizlabs/PHP_CodeSniffer/wiki"
             },
-            "time": "2021-12-12T21:44:58+00:00"
-        },
-        {
-            "name": "symfony/polyfill-ctype",
-            "version": "v1.23.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "46cd95797e9df938fdd2b03693b5fca5e64b01ce"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/46cd95797e9df938fdd2b03693b5fca5e64b01ce",
-                "reference": "46cd95797e9df938fdd2b03693b5fca5e64b01ce",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1"
-            },
-            "suggest": {
-                "ext-ctype": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.23-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Ctype\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Gert de Pagter",
-                    "email": "BackEndTea@gmail.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for ctype functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "ctype",
-                "polyfill",
-                "portable"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-ctype/tree/v1.23.0"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2021-02-19T12:13:01+00:00"
+            "time": "2022-06-13T06:31:38+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -2705,21 +2693,21 @@
         },
         {
             "name": "webmozart/assert",
-            "version": "1.10.0",
+            "version": "1.11.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozarts/assert.git",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
-                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/11cb2199493b2f8a3b53e7f19068fc6aac760991",
+                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2 || ^8.0",
-                "symfony/polyfill-ctype": "^1.8"
+                "ext-ctype": "*",
+                "php": "^7.2 || ^8.0"
             },
             "conflict": {
                 "phpstan/phpstan": "<0.12.20",
@@ -2757,9 +2745,9 @@
             ],
             "support": {
                 "issues": "https://github.com/webmozarts/assert/issues",
-                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
             },
-            "time": "2021-03-09T10:59:23+00:00"
+            "time": "2022-06-03T18:03:27+00:00"
         }
     ],
     "aliases": [],
@@ -2771,5 +2759,5 @@
         "php": "^7.2|^8.0"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.1.0"
+    "plugin-api-version": "2.2.0"
 }
diff --git a/src/AbbreviationInlineParser.php b/src/AbbreviationInlineParser.php
index 9dcb2e6..d7c94bc 100644
--- a/src/AbbreviationInlineParser.php
+++ b/src/AbbreviationInlineParser.php
@@ -48,6 +48,8 @@ public function parse(InlineParserContext $inlineContext): bool
 
         }
 
+        // $title = htmlspecialchars($title);
+
         $elem = new Abbreviation($abbr, ['attributes' => ['title' => $title]]);
 
         $inlineContext->getContainer()->appendChild($elem);
diff --git a/tests/DefectTest.php b/tests/DefectTest.php
new file mode 100644
index 0000000..5395aea
--- /dev/null
+++ b/tests/DefectTest.php
@@ -0,0 +1,81 @@
+<?php
+declare(strict_types=1);
+
+namespace Eightfold\CommonMarkAbbreviations\Tests;
+
+use PHPUnit\Framework\TestCase;
+
+use League\CommonMark\Environment\Environment;
+use League\CommonMark\MarkdownConverter;
+use League\CommonMark\Event\DocumentParsedEvent;
+
+use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;
+use League\CommonMark\Extension\ExternalLink\ExternalLinkExtension;
+use League\CommonMark\Extension\Attributes\AttributesExtension;
+use League\CommonMark\Extension\HeadingPermalink\HeadingPermalinkExtension;
+use League\CommonMark\Extension\TableOfContents\TableOfContentsExtension;
+
+use Eightfold\CommonMarkAbbreviations\Abbreviation;
+use Eightfold\CommonMarkAbbreviations\AbbreviationExtension;
+
+class DefectTest extends TestCase
+{
+    /**
+     * @test
+     * @group defect
+     */
+    public function apostrophes_are_bad()
+    {
+        // getting: <p>From what I understand, the <abbr title="Standards and Poorʼs 500 index">S&P 500</abbr>officially entered bear market status.</p>
+        // or (if using prime not apostrophe) <p>From what I understand, the <abbr title="Standards and Poorʼs 500 index">S&P 500</abbr>fficially entered bear market status.</p>
+        $expected = <<<html
+            <p>From what I understand, the <abbr title="Standards and Poorʼs 500 index">S&P 500</abbr> officially entered bear market status.</p>
+
+            html;
+
+        $markdown = <<<md
+            From what I understand, the [.Standards and Poorʼs 500 index](S&P 500) officially entered bear market status.
+            md;
+
+        $actual = static::converter()->convertToHtml($markdown)->getContent();
+
+        $this->assertEquals($expected, $actual);
+    }
+
+// -> Conveniences
+    static private function converter(Environment $environment = null)
+    {
+        if ($environment === null) {
+            $environment = static::basicEnvironment();
+        }
+        return new MarkdownConverter($environment);
+    }
+
+    static private function basicEnvironment()
+    {
+        $config = [
+            "external_link" => ["open_in_new_window" => true]
+        ];
+
+        return (new Environment($config))
+            ->addExtension(new CommonMarkCoreExtension())
+            ->addExtension(new AbbreviationExtension())
+            ->addExtension(new ExternalLinkExtension());
+    }
+
+    static private function fileContents(string $fileName, string $basePath = "")
+    {
+        if (strlen($basePath) === 0) {
+            $basePath = __DIR__;
+        }
+        return file_get_contents($basePath ."/". $fileName);
+    }
+
+    static private function projectBasePath()
+    {
+        $dir = __DIR__;
+        $parts = explode("/", $dir);
+        array_pop($parts);
+        return implode("/", $parts);
+    }
+}