diff --git a/requirements.txt b/requirements.txt
index 6f7d7ad..91d36bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.2
 PyWavelets==0.5.2
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==16.0.2
 qtconsole==4.3.1
 scikit-image==0.13.0
diff --git a/requirements_gpu.txt b/requirements_gpu.txt
index 4329941..0da458c 100644
--- a/requirements_gpu.txt
+++ b/requirements_gpu.txt
@@ -37,7 +37,7 @@ pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.2
 PyWavelets==0.5.2
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==16.0.2
 qtconsole==4.3.1
 scikit-image==0.13.0