diff --git a/wa/workloads/stress_ng/__init__.py b/wa/workloads/stress_ng/__init__.py
index 21a8db29..c4e0df61 100644
--- a/wa/workloads/stress_ng/__init__.py
+++ b/wa/workloads/stress_ng/__init__.py
@@ -15,11 +15,11 @@
 # pylint: disable=attribute-defined-outside-init
 
 import os
-import yaml
 
 from wa import Workload, Parameter, ConfigError, Executable
 from wa.framework.exception import WorkloadError
 from wa.utils.exec_control import once
+from wa.utils.serializer import yaml
 
 
 class StressNg(Workload):