diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b5665b..aec8b12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 All notable changes to `laravel-trend` will be documented in this file.
 
+## 1.0.1 - 2025-04-18
+
+- Fixed SQLite week interval date format compatibility issue
+- Added support for SQLite 3.46+ ISO week format
+
 ## 1.0.0 - 202X-XX-XX
 
 - initial release
diff --git a/src/Adapters/SqliteAdapter.php b/src/Adapters/SqliteAdapter.php
index 3e17022..a1431bb 100644
--- a/src/Adapters/SqliteAdapter.php
+++ b/src/Adapters/SqliteAdapter.php
@@ -3,21 +3,66 @@
 namespace Flowframe\Trend\Adapters;
 
 use Error;
+use Illuminate\Support\Facades\DB;
 
 class SqliteAdapter extends AbstractAdapter
 {
     public function format(string $column, string $interval): string
     {
+        // Get SQLite version
+        $sqliteVersion = null;
+        try {
+            $versionInfo = DB::select('SELECT sqlite_version() as version')[0] ?? null;
+            if ($versionInfo) {
+                $sqliteVersion = $versionInfo->version;
+            }
+        } catch (\Throwable $e) {
+            // Silently fail if version check fails
+        }
+        
         $format = match ($interval) {
             'minute' => '%Y-%m-%d %H:%M:00',
             'hour' => '%Y-%m-%d %H:00',
             'day' => '%Y-%m-%d',
-            'week' => '%Y-%W',
+            'week' => $this->getWeekFormat($column, $sqliteVersion),
             'month' => '%Y-%m',
             'year' => '%Y',
             default => throw new Error('Invalid interval.'),
         };
 
-        return "strftime('{$format}', {$column})";
+        // For non-week intervals, use regular strftime formatting
+        if ($interval !== 'week' || $this->usesBuiltInISOWeek($sqliteVersion)) {
+            return "strftime('{$format}', {$column})";
+        }
+
+        // For week interval, return the concatenated expression
+        return $format;
+    }
+    
+    /**
+     * Get the appropriate SQL expression for week formatting based on SQLite version
+     */
+    protected function getWeekFormat(string $column, ?string $sqliteVersion): string
+    {
+        // SQLite 3.46+ supports %G-%V format for ISO week numbers
+        if ($this->usesBuiltInISOWeek($sqliteVersion)) {
+            return '%G-%V';
+        }
+        
+        // For older SQLite versions, use custom expression to match the ISO format
+        return "strftime('%Y', {$column}) || '-' || (strftime('%W', {$column}) + 1)";
+    }
+    
+    /**
+     * Check if SQLite version supports ISO week format
+     */
+    protected function usesBuiltInISOWeek(?string $version): bool
+    {
+        if (!$version) {
+            return false;
+        }
+        
+        $versionNumber = (float) $version;
+        return $versionNumber >= 3.46;
     }
 }
diff --git a/tests/Feature/SqliteWeekFormatTest.php b/tests/Feature/SqliteWeekFormatTest.php
new file mode 100644
index 0000000..1b30369
--- /dev/null
+++ b/tests/Feature/SqliteWeekFormatTest.php
@@ -0,0 +1,89 @@
+<?php
+
+use Carbon\Carbon;
+use Flowframe\Trend\Adapters\SqliteAdapter;
+use Flowframe\Trend\Trend;
+use Flowframe\Trend\TrendValue;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Collection;
+use Mockery;
+
+beforeEach(function () {
+    $this->now = Carbon::parse('2023-01-15'); // middle of January 2023
+    Carbon::setTestNow($this->now);
+    
+    // Mock the database connection and query builder
+    $this->builder = Mockery::mock(Builder::class);
+    $this->baseBuilder = Mockery::mock();
+    
+    // Setup the builder to return our test values and SQLite driver
+    $this->builder->shouldReceive('getConnection->getDriverName')->andReturn('sqlite');
+    $this->builder->shouldReceive('toBase')->andReturn($this->baseBuilder);
+    
+    // Create test data for two weeks (formatted as they would be from SQLite)
+    $week1 = '2023-2'; // Week 2 of 2023
+    $week2 = '2023-3'; // Week 3 of 2023
+    
+    $this->testData = collect([
+        (object) ['date' => $week1, 'aggregate' => 10],
+        (object) ['date' => $week2, 'aggregate' => 20],
+    ]);
+});
+
+afterEach(function () {
+    Mockery::close();
+    Carbon::setTestNow();
+});
+
+it('correctly handles week format for SQLite', function () {
+    // Set up mock to return test data
+    $this->baseBuilder->shouldReceive('selectRaw')->andReturnSelf();
+    $this->baseBuilder->shouldReceive('whereBetween')->andReturnSelf();
+    $this->baseBuilder->shouldReceive('groupBy')->andReturnSelf();
+    $this->baseBuilder->shouldReceive('orderBy')->andReturnSelf();
+    $this->baseBuilder->shouldReceive('get')->andReturn($this->testData);
+    
+    // Create trend for weeks
+    $trend = Trend::query($this->builder)
+        ->between(
+            Carbon::parse('2023-01-01'), // Start of week 1
+            Carbon::parse('2023-01-21')  // End of week 3
+        )
+        ->perWeek()
+        ->count();
+    
+    expect($trend)->toBeInstanceOf(Collection::class);
+    
+    // Should have 3 weeks (week 1, 2, and 3)
+    expect($trend)->toHaveCount(3);
+    
+    // Check that the weeks are correctly represented
+    $weeks = $trend->pluck('date')->toArray();
+    expect($weeks)->toContain('2023-1');
+    expect($weeks)->toContain('2023-2');
+    expect($weeks)->toContain('2023-3');
+    
+    // Week 1 should have 0 since we didn't provide data for it (falls back to placeholder)
+    $week1Value = $trend->firstWhere('date', '2023-1');
+    expect($week1Value->aggregate)->toBe(0);
+    
+    // Week 2 should have 10
+    $week2Value = $trend->firstWhere('date', '2023-2');
+    expect($week2Value->aggregate)->toBe(10);
+    
+    // Week 3 should have 20
+    $week3Value = $trend->firstWhere('date', '2023-3');
+    expect($week3Value->aggregate)->toBe(20);
+});
+
+it('creates the right sqlite adapter format string for weeks', function () {
+    $adapter = new SqliteAdapter();
+    
+    // Call the format method for the 'week' interval
+    $formatString = $adapter->format('created_at', 'week');
+    
+    // Verify the format contains some expected text
+    expect($formatString)->toContain("strftime('%Y', created_at)");
+    expect($formatString)->toContain("strftime('%W', created_at) + 1");
+}); 
\ No newline at end of file