diff --git a/requirements.txt b/requirements.txt
index 2dfcfb7..34b4514 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-PyYAML==3.12
+PyYAML==5.3
 future==0.16.0
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 02fe5e2..d5b4744 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,6 +7,6 @@ tox==2.4.1
 coverage==4.2
 Sphinx==1.4.8
 cryptography==2.0.2
-PyYAML==3.12
+PyYAML==5.3
 pytest==3.0.3
 future==0.16.0