diff --git a/app/Console/Commands/Admin/ImportEmojis.php b/app/Console/Commands/Admin/ImportEmojis.php
index 43500fbf2..3d982b7e3 100644
--- a/app/Console/Commands/Admin/ImportEmojis.php
+++ b/app/Console/Commands/Admin/ImportEmojis.php
@@ -104,14 +104,14 @@ class ImportEmojis extends Command
         return Command::SUCCESS;
     }
 
-    private function isImage($file)
+    private function isImage($file): bool
     {
         $image = getimagesize($file->getPathname());
 
         return $image !== false;
     }
 
-    private function isEmoji($filename)
+    private function isEmoji($filename): bool
     {
         $allowedMimeTypes = ['image/png', 'image/jpeg', 'image/webp', 'image/jpg'];
         $mimeType = mime_content_type($filename);
diff --git a/app/Console/Commands/FixBugs/AvatarStorageDeepClean.php b/app/Console/Commands/FixBugs/AvatarStorageDeepClean.php
index c2d60561a..2c1b59cc6 100644
--- a/app/Console/Commands/FixBugs/AvatarStorageDeepClean.php
+++ b/app/Console/Commands/FixBugs/AvatarStorageDeepClean.php
@@ -95,7 +95,7 @@ class AvatarStorageDeepClean extends Command
         }
     }
 
-    protected function activeCheck()
+    protected function activeCheck(): bool
     {
         return ! Storage::exists('avatar-deep-clean.json') && ! Cache::has('cmd:asdp');
     }
diff --git a/app/Jobs/InboxPipeline/InboxWorker.php b/app/Jobs/InboxPipeline/InboxWorker.php
index be268afbb..87f0f8636 100644
--- a/app/Jobs/InboxPipeline/InboxWorker.php
+++ b/app/Jobs/InboxPipeline/InboxWorker.php
@@ -182,7 +182,7 @@ class InboxWorker implements ShouldQueue
      * path is not, a single trailing slash is ignored. Query and fragment
      * are part of the comparison so they cannot be used to alias an actor.
      */
-    protected static function sameActorUrl($a, $b)
+    protected static function sameActorUrl($a, $b): bool
     {
         $a = self::normalizeUrl($a);
         $b = self::normalizeUrl($b);
diff --git a/app/Models/CustomFilter.php b/app/Models/CustomFilter.php
index d6f3404ca..5d8ae1c5f 100644
--- a/app/Models/CustomFilter.php
+++ b/app/Models/CustomFilter.php
@@ -124,7 +124,7 @@ class CustomFilter extends Model
         $this->attributes['action'] = $value ? self::ACTION_HIDE : self::ACTION_WARN;
     }
 
-    public function getIrreversibleAttribute()
+    public function getIrreversibleAttribute(): bool
     {
         return $this->action === self::ACTION_HIDE;
     }
@@ -153,7 +153,7 @@ class CustomFilter extends Model
         });
     }
 
-    public function isExpired()
+    public function isExpired(): bool
     {
         return $this->expires_at !== null && $this->expires_at->isPast();
     }
diff --git a/app/Models/DirectMessage.php b/app/Models/DirectMessage.php
index f7eaf2525..92bec7c53 100644
--- a/app/Models/DirectMessage.php
+++ b/app/Models/DirectMessage.php
@@ -28,7 +28,7 @@ class DirectMessage extends Model
         return $this->belongsTo(Profile::class, 'to_id', 'id');
     }
 
-    public function me()
+    public function me(): bool
     {
         return Auth::user()->profile->id === $this->from_id;
     }
diff --git a/app/Policies/CustomFilterPolicy.php b/app/Policies/CustomFilterPolicy.php
index 456f74308..bcf9489a3 100644
--- a/app/Policies/CustomFilterPolicy.php
+++ b/app/Policies/CustomFilterPolicy.php
@@ -20,7 +20,7 @@ class CustomFilterPolicy
      *
      * @return bool
      */
-    public function view(User $user, CustomFilter $filter)
+    public function view(User $user, CustomFilter $filter): bool
     {
         return $user->profile_id === $filter->profile_id;
     }
@@ -38,7 +38,7 @@ class CustomFilterPolicy
      *
      * @return bool
      */
-    public function update(User $user, CustomFilter $filter)
+    public function update(User $user, CustomFilter $filter): bool
     {
         return $user->profile_id === $filter->profile_id;
     }
@@ -48,7 +48,7 @@ class CustomFilterPolicy
      *
      * @return bool
      */
-    public function delete(User $user, CustomFilter $filter)
+    public function delete(User $user, CustomFilter $filter): bool
     {
         return $user->profile_id === $filter->profile_id;
     }
diff --git a/app/Services/AdminShadowFilterService.php b/app/Services/AdminShadowFilterService.php
index 34ed7cdff..76601f43b 100644
--- a/app/Services/AdminShadowFilterService.php
+++ b/app/Services/AdminShadowFilterService.php
@@ -35,7 +35,7 @@ class AdminShadowFilterService
         });
     }
 
-    public static function canAddToPublicFeedByProfileId($profileId)
+    public static function canAddToPublicFeedByProfileId($profileId): bool
     {
         return ! in_array($profileId, self::getHideFromPublicFeedsList());
     }
diff --git a/app/Services/AutospamService.php b/app/Services/AutospamService.php
index f0acbcd92..f8cc09569 100644
--- a/app/Services/AutospamService.php
+++ b/app/Services/AutospamService.php
@@ -60,7 +60,7 @@ class AutospamService
         });
     }
 
-    public static function active()
+    public static function active(): bool
     {
         return config_cache('autospam.nlp.enabled') && self::eligible();
     }
diff --git a/app/Util/Lexer/Validator.php b/app/Util/Lexer/Validator.php
index b3b0f949c..01b132a58 100755
--- a/app/Util/Lexer/Validator.php
+++ b/app/Util/Lexer/Validator.php
@@ -379,7 +379,7 @@ class Validator extends Regex
      * @param  bool  $optional  Whether a match is compulsory or not.
      * @return bool Whether an exact match was found.
      */
-    protected static function isValidMatch($string, $pattern, $optional = false)
+    protected static function isValidMatch($string, $pattern, $optional = false): bool
     {
         $found = preg_match($pattern, $string, $matches);
         if (! $optional) {