diff --git a/README.md b/README.md
index eb8e02d..830d34a 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ I'd also love PRs to add translations. Maybe contact me first or open an issue i
 
 I am manually curating the list of features and related content here. And I'd love for people to help by PR-ing additions.
 
-Feautures to add to the list will need to meet the following criteria:
+Features to add to the list will need to meet the following criteria:
 
 * They were added, deprecated or removed in PHP version 5.6 or greater.
 
@@ -58,7 +58,7 @@ PHP features are listed in `features.js`. Hopefully the format of this makes sen
 * the whole thing is a JSON array
 * each entry is an object with the following properties:
   * `name`: The name of the feature - plain text only
-  * `description`: A description of the feature - HTML is allowed, but may not be styled. `<code>` tags are fine.
+  * `description`: A description of the feature - HTML is allowed, but may not be styled. `<code>` tags are fine and backticks will be converted to code tags.
   * `keywords`: An array of strings. These are used when searching, so add strings that people may use to search for this feature.
   * `added`: A string for the version of PHP that the feature was added. Must be in the format `X.Y`, e.g. `7.0`. Use `0.0` if this is not known or appropriate.
   * `deprecated`: A string for the version of PHP that the feature was deprecated. Must be in the format `X.Y`, e.g. `8.0`. Use `null` if this is not know or appropriate.
diff --git a/features.js b/features.js
index ef36c52..eda5b8f 100644
--- a/features.js
+++ b/features.js
@@ -1,4 +1,23 @@
 const features = [
+    {
+        name: 'Fibers (Fiber class, Fiber exceptions)',
+        description: 'Lightweight concurrency for PHP. Fibers represent full-stack, interruptible functions. Fibers may be suspended from anywhere in the call-stack, pausing execution within the fiber until the fiber is resumed at a later time.',
+        keywords: [
+            'class', 'types', 'functionality', 'concurrency', 'interruptible', 'functions'
+        ],
+        added: '8.1',
+        deprecated: null,
+        removed: null,
+        resources: [
+            {
+                name: 'PHP.Watch Introduction to Fibers (php.watch)',
+                url: 'https://php.watch/versions/8.1/fibers'
+            }, {
+                name: 'Fibres overview and documentation (php.net)',
+                url: 'https://www.php.net/manual/en/language.fibers.php'
+            }
+        ]
+    },
     {
         name: 'Enums',
         description: 'Enums are a way to define a set of named constants.',
@@ -542,5 +561,45 @@ const features = [
                 url: 'https://www.php.net/manual/en/function.get-magic-quotes-gpc.php'
             }
         ]
+    },
+    {
+        name: 'FILTER_FLAG_SCHEME_REQUIRED constant',
+        description: 'Filter flag for `filter_var()` for use with `FILTER_VALIDATE_URL`',
+        keywords: [
+            'filters', 'constants', 'deprecated', 'removed', 'urls', 'validation'
+        ],
+        added: '0.0',
+        deprecated: '7.3.0',
+        removed: '8.0',
+        resources: [
+            {
+                name: 'Validate filters (php.net)',
+                url: 'https://www.php.net/manual/en/filter.filters.validate.php'
+            },
+            {
+                name: 'Filter flags (php.net)',
+                url: 'https://www.php.net/manual/en/filter.filters.flags.php'
+            }
+        ]
+    },
+    {
+        name: 'FILTER_FLAG_HOST_REQUIRED constant',
+        description: 'Filter flag for `filter_var()` for use with `FILTER_VALIDATE_URL`',
+        keywords: [
+            'filters', 'constants', 'deprecated', 'removed', 'urls', 'validation'
+        ],
+        added: '0.0',
+        deprecated: '7.3.0',
+        removed: '8.0',
+        resources: [
+            {
+                name: 'Validate filters (php.net)',
+                url: 'https://www.php.net/manual/en/filter.filters.validate.php'
+            },
+            {
+                name: 'Filter flags (php.net)',
+                url: 'https://www.php.net/manual/en/filter.filters.flags.php'
+            }
+        ]
     }
 ]
diff --git a/index.html b/index.html
index 2d10ccd..01cd974 100644
--- a/index.html
+++ b/index.html
@@ -58,7 +58,7 @@ <h2 x-text="feature.name" class="text-lg mb-4 font-bold"></h2>
                             <div class="flex">
                                 <!-- Feature top panel, left column -->
                                 <div class="w-3/4 pr-4">
-                                    <p x-html="feature.description" class="mb-6"></p>
+                                    <p x-html="formatAsHtml(feature.description)" class="mb-6"></p>
                                     <h3 class="font-bold text-l mb-2">Resources</h3>
                                     <ul x-show="feature?.resources?.length > 0" class="list-disc list-inside text-sm mb-4">
                                         <template x-for="resource in feature.resources">
@@ -184,6 +184,16 @@ <h3 class="font-bold text-l mb-2">Resources</h3>
                     featuresHaving(featureKeyword) {
                         const versions = features.filter(feature => this.featureMatches(feature, featureKeyword));
                         return versions;
+                    },
+
+                    /*
+                     * This does some basic formatting.
+                     *
+                     *  - backticks are converted to <code></code>
+                     */
+                    formatAsHtml(rawString) {
+                        htmlString = rawString.replace(/`(.*?)`/g, '<code>$1</code>');
+                        return htmlString;
                     }
                 }
             });