diff --git a/requirements.txt b/requirements.txt
index 8a695da6..fae5c1fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ Pygments==2.2.0
 pyparsing==2.2.0
 pytest==3.5.1
 pytz==2018.4
-PyYAML==3.12
+PyYAML==5.4
 recommonmark==0.4.0
 requests==2.18.4
 rinoh-typeface-dejavuserif==0.1.1
diff --git a/setup.py b/setup.py
index b40a7721..c44a8f4d 100644
--- a/setup.py
+++ b/setup.py
@@ -77,7 +77,7 @@
         "pyparsing==2.2.0",
         "pytest==3.5.1",
         "pytz==2018.4",
-        "PyYAML==3.12",
+        "PyYAML==5.4",
         "recommonmark==0.4.0",
         "requests==2.18.4",
         "rinoh-typeface-dejavuserif==0.1.1",