diff --git a/requirements.txt b/requirements.txt
index e98d3bb..8485693 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -83,7 +83,7 @@ pytest-cov==2.5.1
 python-dateutil==2.7.5
 pytz==2018.7
 PyWavelets==1.0.1
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.3
 QtPy==1.9.0
diff --git a/requirements_gpu.txt b/requirements_gpu.txt
index 604ac3f..7933dc0 100644
--- a/requirements_gpu.txt
+++ b/requirements_gpu.txt
@@ -83,7 +83,7 @@ pytest-cov==2.5.1
 python-dateutil==2.7.5
 pytz==2018.7
 PyWavelets==1.0.1
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.3
 QtPy==1.9.0