diff --git a/src/NovaTabTranslatable.php b/src/NovaTabTranslatable.php
index 6aeaf10..4238968 100644
--- a/src/NovaTabTranslatable.php
+++ b/src/NovaTabTranslatable.php
@@ -86,7 +86,7 @@ public function saveLastSelectedLang(bool $state = true): self
         ]);
     }
 
-    protected function createTranslatableFields()
+    protected function createTranslatableFields(): void
     {
         collect($this->locales)
             ->crossJoin($this->originalFields)
@@ -244,21 +244,21 @@ protected function compatibilityWithOtherPlugins($translatedField)
         return $translatedField;
     }
 
-    public function resolve($resource, $attribute = null)
+    public function resolve($resource, $attribute = null): void
     {
         foreach ($this->data as $field) {
             $field->resolve($resource, $attribute);
         }
     }
 
-    public function fillInto($request, $model, $attribute, $requestAttribute = null)
+    public function fillInto($request, $model, $attribute, $requestAttribute = null): void
     {
         foreach ($this->data as $field) {
             $field->fill($request, $model);
         }
     }
 
-    public function getCreationRules(NovaRequest $request)
+    public function getCreationRules(NovaRequest $request): array
     {
         $fieldsRules = $this->getSituationalRulesSet($request, 'creationRules');
 
@@ -268,7 +268,7 @@ public function getCreationRules(NovaRequest $request)
         );
     }
 
-    protected function getSituationalRulesSet(NovaRequest $request, string $propertyName = 'rules')
+    protected function getSituationalRulesSet(NovaRequest $request, string $propertyName = 'rules'): array
     {
         $fieldsRules = [$this->attribute => []];
 
@@ -281,7 +281,7 @@ protected function getSituationalRulesSet(NovaRequest $request, string $property
         return $fieldsRules;
     }
 
-    public function getUpdateRules(NovaRequest $request)
+    public function getUpdateRules(NovaRequest $request): array
     {
         $fieldsRules = $this->getSituationalRulesSet($request, 'updateRules');
 
@@ -291,7 +291,7 @@ public function getUpdateRules(NovaRequest $request)
         );
     }
 
-    public function getRules(NovaRequest $request)
+    public function getRules(NovaRequest $request): array
     {
         return $this->getSituationalRulesSet($request);
     }