diff --git a/dev/requirements_old.txt b/dev/requirements_old.txt
index 09761645e..7f83a7d99 100644
--- a/dev/requirements_old.txt
+++ b/dev/requirements_old.txt
@@ -49,7 +49,7 @@ Pygments==2.4.2
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.0.2
 requests==2.22.0
 scikit-learn==0.21.3
diff --git a/requirements.txt b/requirements.txt
index e27a454ee..8e723d312 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ Pygments==2.4.2
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.0.2
 requests==2.22.0
 requests-oauthlib==1.3.0
diff --git a/src/requirements.txt b/src/requirements.txt
index e27a454ee..8e723d312 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -56,7 +56,7 @@ Pygments==2.4.2
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.0.2
 requests==2.22.0
 requests-oauthlib==1.3.0