diff --git a/.github/workflows/backend.yml b/.github/workflows/backend.yml
new file mode 100644
index 0000000..c88f255
--- /dev/null
+++ b/.github/workflows/backend.yml
@@ -0,0 +1,11 @@
+name: FoF Follow Tags PHP
+
+on: [workflow_dispatch, push, pull_request]
+
+jobs:
+  run:
+    uses: flarum/framework/.github/workflows/REUSABLE_backend.yml@main
+    with:
+      enable_backend_testing: false
+
+      backend_directory: .
diff --git a/.github/workflows/build.yml b/.github/workflows/frontend.yml
similarity index 87%
rename from .github/workflows/build.yml
rename to .github/workflows/frontend.yml
index e6c7f2e..dd544ec 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/frontend.yml
@@ -1,4 +1,4 @@
-name: Javascript
+name: FoF Follow Tags JS
 
 on: [workflow_dispatch, push, pull_request]
 
@@ -8,11 +8,12 @@ jobs:
     with:
       enable_bundlewatch: false
       enable_prettier: true
-      enable_typescript: false
+      enable_typescript: true
 
       frontend_directory: ./js
       backend_directory: .
       js_package_manager: yarn
       main_git_branch: master
+
     secrets:
       bundlewatch_github_token: ${{ secrets.BUNDLEWATCH_GITHUB_TOKEN }}
diff --git a/composer.json b/composer.json
index f370df4..54e236d 100644
--- a/composer.json
+++ b/composer.json
@@ -1,65 +1,80 @@
 {
-  "name": "fof/follow-tags",
-  "description": "Follow tags and be notified of new discussions and replies",
-  "keywords": [
-    "flarum"
-  ],
-  "type": "flarum-extension",
-  "license": "MIT",
-  "support": {
-    "issues": "https://github.com/FriendsOfFlarum/follow-tags/issues",
-    "source": "https://github.com/FriendsOfFlarum/follow-tags",
-    "forum": "https://discuss.flarum.org/d/20525"
-  },
-  "homepage": "https://friendsofflarum.org",
-  "funding": [
-    {
-      "type": "website",
-      "url": "https://opencollective.com/fof/donate"
-    }
-  ],
-  "require": {
-    "flarum/core": "^1.3.0",
-    "flarum/tags": "^1.3.0",
-    "fof/extend": "^1.0.0"
-  },
-  "authors": [
-    {
-      "name": "David Sevilla Martín",
-      "email": "me+fof@datitisev.me",
-      "role": "Developer"
+    "name": "fof/follow-tags",
+    "description": "Follow tags and be notified of new discussions and replies",
+    "keywords": [
+        "flarum"
+    ],
+    "type": "flarum-extension",
+    "license": "MIT",
+    "support": {
+        "issues": "https://github.com/FriendsOfFlarum/follow-tags/issues",
+        "source": "https://github.com/FriendsOfFlarum/follow-tags",
+        "forum": "https://discuss.flarum.org/d/20525"
     },
-    {
-      "name": "IanM",
-      "email": "ian@flarum.org",
-      "role": "Developer"
-    }
-  ],
-  "autoload": {
-    "psr-4": {
-      "FoF\\FollowTags\\": "src/"
-    }
-  },
-  "extra": {
-    "flarum-extension": {
-      "title": "FoF Follow Tags",
-      "category": "feature",
-      "icon": {
-        "name": "fas fa-user-tag",
-        "backgroundColor": "#e74c3c",
-        "color": "#fff"
-      },
-      "optional-dependencies": [
-        "flarum/subscriptions",
-        "flarum/approval"
-      ]
+    "homepage": "https://friendsofflarum.org",
+    "funding": [
+        {
+            "type": "website",
+            "url": "https://opencollective.com/fof/donate"
+        }
+    ],
+    "require": {
+        "flarum/core": "^1.8.3",
+        "flarum/tags": "^1.8.0",
+        "fof/extend": "^1.2.0"
+    },
+    "authors": [
+        {
+            "name": "David Sevilla Martín",
+            "email": "me+fof@datitisev.me",
+            "role": "Developer"
+        },
+        {
+            "name": "IanM",
+            "email": "ian@flarum.org",
+            "role": "Developer"
+        }
+    ],
+    "autoload": {
+        "psr-4": {
+            "FoF\\FollowTags\\": "src/"
+        }
+    },
+    "extra": {
+        "flarum-extension": {
+            "title": "FoF Follow Tags",
+            "category": "feature",
+            "icon": {
+                "name": "fas fa-user-tag",
+                "backgroundColor": "#e74c3c",
+                "color": "#fff"
+            },
+            "optional-dependencies": [
+                "flarum/subscriptions",
+                "flarum/approval",
+                "flarum/mentions"
+            ]
+        },
+        "flagrow": {
+            "discuss": "https://discuss.flarum.org/d/20525"
+        },
+        "flarum-cli": {
+            "modules": {
+                "githubActions": true
+            }
+        }
+    },
+    "require-dev": {
+        "flarum/approval": "*",
+        "flarum/subscriptions": "*",
+        "flarum/phpstan": "*",
+        "flarum/mentions": "*"
+    },
+    "scripts": {
+        "analyse:phpstan": "phpstan analyse",
+        "clear-cache:phpstan": "phpstan clear-result-cache"
     },
-    "flagrow": {
-      "discuss": "https://discuss.flarum.org/d/20525"
+    "scripts-descriptions": {
+        "analyse:phpstan": "Run static analysis"
     }
-  },
-  "require-dev": {
-    "flarum/approval": "*",
-    "flarum/subscriptions": "*"
-  }
 }
diff --git a/extend.php b/extend.php
index fe1c019..4cfa0b6 100644
--- a/extend.php
+++ b/extend.php
@@ -17,6 +17,7 @@
 use Flarum\Extend;
 use Flarum\Post\Event as Post;
 use Flarum\Tags\Api\Serializer\TagSerializer;
+use Flarum\Tags\TagState;
 use FoF\Extend\Extend\ExtensionSettings;
 
 return [
@@ -29,6 +30,9 @@
 
     new Extend\Locales(__DIR__.'/resources/locale'),
 
+    (new Extend\Model(TagState::class))
+        ->cast('subscription', 'string'),
+
     (new Extend\Routes('api'))
         ->post('/tags/{id}/subscription', 'fof-follow-tags.subscription', Controllers\ChangeTagSubscription::class),
 
diff --git a/migrations/2022_05_20_000000_add_timestamps_to_tag_user_table.php b/migrations/2022_05_20_000000_add_timestamps_to_tag_user_table.php
index 8871b4e..4366551 100644
--- a/migrations/2022_05_20_000000_add_timestamps_to_tag_user_table.php
+++ b/migrations/2022_05_20_000000_add_timestamps_to_tag_user_table.php
@@ -22,8 +22,8 @@
         // do this manually because dbal doesn't recognize timestamp columns
         $connection = $schema->getConnection();
         $prefix = $connection->getTablePrefix();
-        $connection->statement("ALTER TABLE `${prefix}tag_user` MODIFY created_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP");
-        $connection->statement("ALTER TABLE `${prefix}tag_user` MODIFY updated_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP");
+        $connection->statement("ALTER TABLE `{$prefix}tag_user` MODIFY created_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP");
+        $connection->statement("ALTER TABLE `{$prefix}tag_user` MODIFY updated_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP");
     },
 
     'down' => function (Builder $schema) {
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..03cf261
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,13 @@
+includes:
+  - vendor/flarum/phpstan/extension.neon
+
+parameters:
+  # The level will be increased in Flarum 2.0
+  level: 5
+  paths:
+    - extend.php
+    - src
+  excludePaths:
+    - *.blade.php
+  checkMissingIterableValueType: false
+  databaseMigrationsPath: ['migrations']
diff --git a/src/AddTagSubscriptionAttribute.php b/src/AddTagSubscriptionAttribute.php
index 2266ff9..e09d2ed 100644
--- a/src/AddTagSubscriptionAttribute.php
+++ b/src/AddTagSubscriptionAttribute.php
@@ -13,11 +13,13 @@
 
 use Flarum\Tags\Api\Serializer\TagSerializer;
 use Flarum\Tags\Tag;
+use Flarum\Tags\TagState;
 
 class AddTagSubscriptionAttribute
 {
     public function __invoke(TagSerializer $serializer, Tag $tag, array $attributes): array
     {
+        /** @var TagState $state */
         $state = $tag->stateFor($serializer->getActor());
 
         $attributes['subscription'] = $state->subscription;
diff --git a/src/Controllers/ChangeTagSubscription.php b/src/Controllers/ChangeTagSubscription.php
index d214caf..b36700a 100644
--- a/src/Controllers/ChangeTagSubscription.php
+++ b/src/Controllers/ChangeTagSubscription.php
@@ -15,6 +15,7 @@
 use Flarum\Http\RequestUtil;
 use Flarum\Tags\Api\Serializer\TagSerializer;
 use Flarum\Tags\Tag;
+use Flarum\Tags\TagState;
 use Flarum\User\User;
 use FoF\FollowTags\Event;
 use Illuminate\Contracts\Events\Dispatcher;
@@ -24,9 +25,6 @@
 
 class ChangeTagSubscription extends AbstractShowController
 {
-    /**
-     * {@inheritdoc}
-     */
     public $serializer = TagSerializer::class;
 
     /**
@@ -39,14 +37,8 @@ public function __construct(Dispatcher $events)
         $this->events = $events;
     }
 
-    /**
-     * {@inheritdoc}
-     */
     protected function data(ServerRequestInterface $request, Document $document)
     {
-        /**
-         * @var User
-         */
         $actor = RequestUtil::getActor($request);
         $id = Arr::get($request->getQueryParams(), 'id');
         $subscription = Arr::get($request->getParsedBody(), 'data.subscription');
@@ -54,6 +46,8 @@ protected function data(ServerRequestInterface $request, Document $document)
         $actor->assertRegistered();
 
         $tag = Tag::whereVisibleTo($actor)->findOrFail($id);
+        
+        /** @var TagState $state */
         $state = $tag->stateFor($actor);
 
         if (!in_array($subscription, ['follow', 'lurk', 'ignore', 'hide'])) {
diff --git a/src/Jobs/NotificationJob.php b/src/Jobs/NotificationJob.php
index 00710cd..a771b10 100644
--- a/src/Jobs/NotificationJob.php
+++ b/src/Jobs/NotificationJob.php
@@ -11,12 +11,13 @@
 
 namespace FoF\FollowTags\Jobs;
 
-use Flarum\Database\Eloquent\Collection;
 use Flarum\Notification\Blueprint\BlueprintInterface;
 use Flarum\Notification\NotificationSyncer;
 use Flarum\Queue\AbstractJob;
+use Flarum\User\User;
 use Illuminate\Contracts\Events\Dispatcher;
 use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Database\Eloquent\Collection;
 
 class NotificationJob extends AbstractJob implements ShouldQueue
 {
@@ -30,7 +31,7 @@ class NotificationJob extends AbstractJob implements ShouldQueue
      *
      * @param NotificationSyncer $syncer
      * @param BlueprintInterface $blueprint
-     * @param Collection         $recipients
+     * @param Collection<User>         $recipients
      */
     protected function sync(NotificationSyncer $syncer, BlueprintInterface $blueprint, Collection $recipients): void
     {
diff --git a/src/Jobs/SendNotificationWhenDiscussionIsReTagged.php b/src/Jobs/SendNotificationWhenDiscussionIsReTagged.php
index 8a8fba7..3d17b69 100644
--- a/src/Jobs/SendNotificationWhenDiscussionIsReTagged.php
+++ b/src/Jobs/SendNotificationWhenDiscussionIsReTagged.php
@@ -13,6 +13,7 @@
 
 use Flarum\Discussion\Discussion;
 use Flarum\Notification\NotificationSyncer;
+use Flarum\Tags\Tag;
 use Flarum\User\User;
 use FoF\FollowTags\Notifications\NewDiscussionTagBlueprint;
 use Illuminate\Support\Collection;
@@ -42,8 +43,8 @@ public function handle(NotificationSyncer $notifications)
         }
 
         /**
-         * @var Collection
-         * @var $tagIds    Collection
+         * @var Collection<Tag>|null $tags
+         * @phpstan-ignore-next-line
          */
         $tags = $this->discussion->tags;
         $tagIds = $tags->map->id;
diff --git a/src/Jobs/SendNotificationWhenDiscussionIsStarted.php b/src/Jobs/SendNotificationWhenDiscussionIsStarted.php
index 3390608..c627743 100644
--- a/src/Jobs/SendNotificationWhenDiscussionIsStarted.php
+++ b/src/Jobs/SendNotificationWhenDiscussionIsStarted.php
@@ -36,8 +36,8 @@ public function handle(NotificationSyncer $notifications)
         }
 
         /**
-         * @var Collection
-         * @var $tagIds    Collection
+         * @var Collection<Tag>|null $tags
+         * @phpstan-ignore-next-line
          */
         $tags = $this->discussion->tags;
         $tagIds = $tags->map->id;
diff --git a/src/Jobs/SendNotificationWhenReplyIsPosted.php b/src/Jobs/SendNotificationWhenReplyIsPosted.php
index cfb5657..80df4e8 100644
--- a/src/Jobs/SendNotificationWhenReplyIsPosted.php
+++ b/src/Jobs/SendNotificationWhenReplyIsPosted.php
@@ -25,7 +25,7 @@ class SendNotificationWhenReplyIsPosted extends NotificationJob
     protected $post;
 
     /**
-     * @var Post
+     * @var int
      */
     protected $lastPostNumber;
 
@@ -41,11 +41,13 @@ public function handle(NotificationSyncer $notifications)
             return;
         }
 
+        
+        $discussion = $this->post->discussion;
+
         /**
-         * @var Collection
-         * @var $tagIds    Collection
+         * @var Collection<Tag>|null $tags
+         * @phpstan-ignore-next-line
          */
-        $discussion = $this->post->discussion;
         $tags = $discussion->tags;
         $tagIds = $tags->map->id;
 
diff --git a/src/Listeners/PreventMentionNotificationsFromIgnoredTags.php b/src/Listeners/PreventMentionNotificationsFromIgnoredTags.php
index 23d8dd4..80f979b 100644
--- a/src/Listeners/PreventMentionNotificationsFromIgnoredTags.php
+++ b/src/Listeners/PreventMentionNotificationsFromIgnoredTags.php
@@ -24,12 +24,8 @@ public function __invoke(BlueprintInterface $blueprint, array $recipients): arra
             return $recipients;
         }
 
-        /**
-         * @var PostMentionedBlueprint|UserMentionedBlueprint
-         * @var $ids                                          \Illuminate\Support\Collection
-         * @var $tags                                         \Illuminate\Support\Collection
-         */
         $ids = collect($recipients)->pluck('id');
+        /** @phpstan-ignore-next-line */
         $tags = $blueprint->post->discussion->tags->pluck('id');
 
         if ($tags->isEmpty()) {