diff --git a/requirements_dev.txt b/requirements_dev.txt
index 0c5d97d..8c56454 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,6 +7,6 @@ tox==2.3.1
 coverage==4.1
 Sphinx==1.4.4
 cryptography==1.4
-PyYAML==4.2b1
+PyYAML==5.4
 pytest==2.9.2
 h5py==2.6.0