diff --git a/rawimage.cpp b/rawimage.cpp
index 0b66fe6..e5cffc2 100644
--- a/rawimage.cpp
+++ b/rawimage.cpp
@@ -31,7 +31,7 @@ void RawImage::allocate(uint32_t w, uint32_t h, uint32_t ch, DataType type)
     m_channels = ch;
     m_ch = ch == 3 ? 4 : ch;
     m_origType = m_type = type;
-    m_pixels.reset(new PixelType[m_width * m_height * m_ch * typeSize(type)]);
+    m_pixels = std::make_unique<PixelType[]>(m_width * m_height * m_ch * typeSize(type));
 }
 
 RawImage::RawImage()
@@ -301,7 +301,8 @@ void *RawImage::origData(uint32_t row, uint32_t col) const
 void RawImage::convertToThumbnail()
 {
     m_thumbAspect = (float)width() / height();
-    uint16_t *out = reinterpret_cast<uint16_t*>(new uint8_t[THUMB_SIZE * THUMB_SIZE * 4 * sizeof(uint16_t)]);
+    std::unique_ptr<PixelType[]> outptr = std::make_unique<PixelType[]>(THUMB_SIZE * THUMB_SIZE * 4 * sizeof(uint16_t));
+    uint16_t *out = reinterpret_cast<uint16_t*>(outptr.get());
 
     auto loop = [&](uint16_t *out, auto *in, auto scale)
     {
@@ -341,12 +342,11 @@ void RawImage::convertToThumbnail()
         loop(out, reinterpret_cast<float*>(m_pixels.get()), 65535.0);
         break;
     default:
-        qDebug() << "Should not happend";
-        delete [] out;
+        qWarning() << "FLOAT64 should not happend";
         return;
     }
 
-    m_pixels.reset(reinterpret_cast<uint8_t*>(out));
+    m_pixels = std::move(outptr);
     m_width = THUMB_SIZE;
     m_height = THUMB_SIZE;
     m_ch = 4;
diff --git a/rawimage.h b/rawimage.h
index d88c0b0..ca2f4ba 100644
--- a/rawimage.h
+++ b/rawimage.h
@@ -58,8 +58,8 @@ protected:
         double m_max[4] = {0.0};
         double m_mad[4] = {0.0};
     };
-    std::unique_ptr<PixelType> m_pixels;
-    std::unique_ptr<PixelType> m_original;
+    std::unique_ptr<PixelType[]> m_pixels;
+    std::unique_ptr<PixelType[]> m_original;
     uint32_t m_width = 0;
     uint32_t m_height = 0;
     uint32_t m_channels = 0;