diff --git a/.gitignore b/.gitignore
index fbba014..93b3def 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@ bin
 /*.webp
 /fixtures/*_out.*
 /.idea/
+fixtures/test_vertical_*.jpg
diff --git a/fixtures/test_gif.jpg b/fixtures/test_gif.jpg
index e69de29..691e4a7 100644
Binary files a/fixtures/test_gif.jpg and b/fixtures/test_gif.jpg differ
diff --git a/fixtures/test_pdf.jpg b/fixtures/test_pdf.jpg
index e69de29..1058bb0 100644
Binary files a/fixtures/test_pdf.jpg and b/fixtures/test_pdf.jpg differ
diff --git a/fixtures/test_svg.jpg b/fixtures/test_svg.jpg
index e69de29..d20c14d 100644
Binary files a/fixtures/test_svg.jpg and b/fixtures/test_svg.jpg differ
diff --git a/resize.go b/resize.go
index dbf1e87..0cd5450 100644
--- a/resize.go
+++ b/resize.go
@@ -9,15 +9,16 @@ import "C"
 import (
 	"errors"
 	"math"
+	"runtime"
 )
 
 // Resize is used to transform a given image as byte buffer
 // with the passed options.
 func Resize(buf []byte, o Options) ([]byte, error) {
 	defer C.vips_thread_shutdown()
+	defer runtime.KeepAlive(buf)
 
 	image, imageType, err := loadImage(buf)
-
 	if err != nil {
 		return nil, err
 	}