diff --git a/src/Adapters/MySqlAdapter.php b/src/Adapters/MySqlAdapter.php
index 74d6d5a..9ff141e 100644
--- a/src/Adapters/MySqlAdapter.php
+++ b/src/Adapters/MySqlAdapter.php
@@ -12,6 +12,7 @@ public function format(string $column, string $interval): string
             'minute' => '%Y-%m-%d %H:%i:00',
             'hour' => '%Y-%m-%d %H:00',
             'day' => '%Y-%m-%d',
+            'week' => '%Y-%u',
             'month' => '%Y-%m',
             'year' => '%Y',
             default => throw new Error('Invalid interval.'),
diff --git a/src/Adapters/PgsqlAdapter.php b/src/Adapters/PgsqlAdapter.php
index 47e44b1..f0701f2 100644
--- a/src/Adapters/PgsqlAdapter.php
+++ b/src/Adapters/PgsqlAdapter.php
@@ -12,6 +12,7 @@ public function format(string $column, string $interval): string
             'minute' => 'YYYY-MM-DD HH24:MI:00',
             'hour' => 'YYYY-MM-DD HH24:00:00',
             'day' => 'YYYY-MM-DD',
+            'week' => 'YYYY-W',
             'month' => 'YYYY-MM',
             'year' => 'YYYY',
             default => throw new Error('Invalid interval.'),
diff --git a/src/Adapters/SqliteAdapter.php b/src/Adapters/SqliteAdapter.php
index 41e524c..3e17022 100644
--- a/src/Adapters/SqliteAdapter.php
+++ b/src/Adapters/SqliteAdapter.php
@@ -12,6 +12,7 @@ public function format(string $column, string $interval): string
             'minute' => '%Y-%m-%d %H:%M:00',
             'hour' => '%Y-%m-%d %H:00',
             'day' => '%Y-%m-%d',
+            'week' => '%Y-%W',
             'month' => '%Y-%m',
             'year' => '%Y',
             default => throw new Error('Invalid interval.'),
diff --git a/src/Trend.php b/src/Trend.php
index 02fb3a7..f4d9628 100755
--- a/src/Trend.php
+++ b/src/Trend.php
@@ -65,6 +65,11 @@ public function perDay(): self
         return $this->interval('day');
     }
 
+    public function perWeek(): self
+    {
+        return $this->interval('week');
+    }
+
     public function perMonth(): self
     {
         return $this->interval('month');
@@ -172,6 +177,7 @@ protected function getCarbonDateFormat(): string
             'minute' => 'Y-m-d H:i:00',
             'hour' => 'Y-m-d H:00',
             'day' => 'Y-m-d',
+            'week' => 'Y-W',
             'month' => 'Y-m',
             'year' => 'Y',
             default => throw new Error('Invalid interval.'),