diff --git a/requirements/generated/requirements-dev.txt b/requirements/generated/requirements-dev.txt
index dd559de3e..bb8d168d6 100644
--- a/requirements/generated/requirements-dev.txt
+++ b/requirements/generated/requirements-dev.txt
@@ -239,7 +239,7 @@ pytz==2021.1
     #   -r requirements/source/requirements-base.in
     #   celery
     #   cla-common
-pyyaml==5.4
+pyyaml==5.3.1
     # via
     #   -r requirements/source/requirements-base.in
     #   aspy.yaml
diff --git a/requirements/generated/requirements-docs.txt b/requirements/generated/requirements-docs.txt
index 73a1ad5ab..dca6b63ef 100644
--- a/requirements/generated/requirements-docs.txt
+++ b/requirements/generated/requirements-docs.txt
@@ -181,7 +181,7 @@ pytz==2021.1
     #   babel
     #   celery
     #   cla-common
-pyyaml==5.4
+pyyaml==5.3.1
     # via -r requirements/source/requirements-base.in
 requests==2.27.1
     # via
diff --git a/requirements/generated/requirements-production.txt b/requirements/generated/requirements-production.txt
index e230094af..baddc9078 100644
--- a/requirements/generated/requirements-production.txt
+++ b/requirements/generated/requirements-production.txt
@@ -160,7 +160,7 @@ pytz==2021.1
     #   -r requirements/source/requirements-base.in
     #   celery
     #   cla-common
-pyyaml==5.4
+pyyaml==5.3.1
     # via -r requirements/source/requirements-base.in
 requests==2.27.1
     # via
diff --git a/requirements/generated/requirements-testing.txt b/requirements/generated/requirements-testing.txt
index 59c51e168..0a49021eb 100644
--- a/requirements/generated/requirements-testing.txt
+++ b/requirements/generated/requirements-testing.txt
@@ -202,7 +202,7 @@ pytz==2021.1
     #   -r requirements/source/requirements-base.in
     #   celery
     #   cla-common
-pyyaml==5.4
+pyyaml==5.3.1
     # via -r requirements/source/requirements-base.in
 requests==2.27.1
     # via
diff --git a/requirements/source/requirements-base.in b/requirements/source/requirements-base.in
index 4611b5ebc..f1534ded6 100644
--- a/requirements/source/requirements-base.in
+++ b/requirements/source/requirements-base.in
@@ -41,7 +41,7 @@ polib==1.0.6
 # Fork PgFulltext - PR added
 https://github.com/ministryofjustice/djorm-ext-pgfulltext/archive/refs/tags/0.1.0.tar.gz
 celery==4.0.2
-PyYAML==5.4
+PyYAML==5.3.1
 pyminizip==0.2.3
 
 #Irat healthcheck and ping package