diff --git a/requirements-gpu.txt b/requirements-gpu.txt
index e1f4f08..4d944f0 100644
--- a/requirements-gpu.txt
+++ b/requirements-gpu.txt
@@ -56,7 +56,7 @@ pyasn1-modules==0.2.8
 Pygments==2.5.2
 pyrsistent==0.15.7
 python-dateutil==2.8.1
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==18.1.1
 qtconsole==4.6.0
 requests==2.22.0
diff --git a/requirements-macos-cpu.txt b/requirements-macos-cpu.txt
index 471568f..ebafb29 100644
--- a/requirements-macos-cpu.txt
+++ b/requirements-macos-cpu.txt
@@ -41,7 +41,7 @@ pyasn1-modules==0.2.8
 Pygments==2.5.2
 pyrsistent==0.15.7
 python-dateutil==2.8.1
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==18.1.1
 qtconsole==4.6.0
 requests==2.22.0
diff --git a/requirements-ubuntu-cpu.txt b/requirements-ubuntu-cpu.txt
index 17d5b80..abeafe7 100644
--- a/requirements-ubuntu-cpu.txt
+++ b/requirements-ubuntu-cpu.txt
@@ -56,7 +56,7 @@ pyasn1-modules==0.2.8
 Pygments==2.5.2
 pyrsistent==0.15.7
 python-dateutil==2.8.1
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==18.1.1
 qtconsole==4.6.0
 requests==2.22.0