diff --git a/sip/execution_control/processing_block_controller/requirements.txt b/sip/execution_control/processing_block_controller/requirements.txt
index a2ad5da5..34617b33 100644
--- a/sip/execution_control/processing_block_controller/requirements.txt
+++ b/sip/execution_control/processing_block_controller/requirements.txt
@@ -5,4 +5,4 @@ redis==2.10.6
 jinja2>=2.10.1
 celery==4.2.1
 kombu==4.3.0
-PyYAML==4.2b4
+PyYAML==5.4
diff --git a/sip/execution_control/processing_block_controller/setup.py b/sip/execution_control/processing_block_controller/setup.py
index 056923a3..9432ba6e 100644
--- a/sip/execution_control/processing_block_controller/setup.py
+++ b/sip/execution_control/processing_block_controller/setup.py
@@ -23,7 +23,7 @@
           'redis==2.10.6',
           'jinja2>=2.10.1',
           'celery==4.2.1',
-          'PyYAML==4.2b4'
+          'PyYAML==5.4'
       ],
       zip_safe=False,
       classifiers=[