diff --git a/sip/execution_control/processing_controller/requirements.txt b/sip/execution_control/processing_controller/requirements.txt
index 294d0ba0..f119ceb4 100644
--- a/sip/execution_control/processing_controller/requirements.txt
+++ b/sip/execution_control/processing_controller/requirements.txt
@@ -5,4 +5,4 @@ skasip-logging>=1.0.14
 jinja2>=2.10.1
 celery==4.2.1
 docker==3.5.1
-PyYAML==4.2b4
+PyYAML==5.4