diff --git a/requirements.txt b/requirements.txt
index b4c3294..3e08924 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ jsonschema==2.6.0
 MarkupSafe==1.0
 pluggy==0.5.2
 py==1.4.34
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 six==1.11.0
 swagger-spec-validator==2.1.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 0ba7058..b29b5c9 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -13,7 +13,7 @@ jsonschema==2.6.0
 MarkupSafe==1.0
 pluggy==0.5.2
 py==1.4.34
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 six==1.11.0
 swagger-spec-validator==2.1.0