diff --git a/requirements.frozen.txt b/requirements.frozen.txt
index fdf5163..876d532 100644
--- a/requirements.frozen.txt
+++ b/requirements.frozen.txt
@@ -48,7 +48,7 @@ pytest-cov==2.6.1
 python-bitcoinlib==0.11.0
 python-dateutil==2.8.0
 pytz==2019.2
-PyYAML==5.1.1
+PyYAML==5.4
 pyzbar==0.1.7
 qrcode==6.0
 readme-renderer==24.0
diff --git a/requirements.txt b/requirements.txt
index 8448520..fbf9a53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ pysha3==1.0.2
 pytest-cov==2.6.1
 pytest==4.4.0
 python-bitcoinlib==0.11.0
-PyYAML==5.1.1
+PyYAML==5.4
 pyzbar==0.1.7
 qrcode[pil]==6.0
 twine==1.13.0