diff --git a/src/Models/ProviderToken.php b/src/Models/ProviderToken.php
index 9825eb7..5ac8de8 100644
--- a/src/Models/ProviderToken.php
+++ b/src/Models/ProviderToken.php
@@ -7,9 +7,9 @@ use Laravel\Socialite\Facades\Socialite;
 
 class ProviderToken extends Model
 {
-	protected $dates = [
-		'access_token_expires_at',
-		'refresh_token_expires_at',
+	protected $casts = [
+		'access_token_expires_at' => 'datetime:Y-m-d H:i:s',
+		'refresh_token_expires_at' => 'datetime:Y-m-d H:i:s',
 	];
 
 	/* ATTRIBUTES */