diff --git a/cinder/image/image_utils.py b/cinder/image/image_utils.py
index b02ba86bb1f..d69ac20d0b9 100644
--- a/cinder/image/image_utils.py
+++ b/cinder/image/image_utils.py
@@ -58,7 +58,7 @@ CONF = cfg.CONF
 CONF.register_opts(image_helper_opts)
 
 QEMU_IMG_LIMITS = processutils.ProcessLimits(
-    cpu_time=8,
+    cpu_time=30,
     address_space=1 * units.Gi)
 
 VALID_DISK_FORMATS = ('raw', 'vmdk', 'vdi', 'qcow2',