diff --git a/nebula_sniffer/requirements.txt b/nebula_sniffer/requirements.txt
index 85e3970..041e7e1 100644
--- a/nebula_sniffer/requirements.txt
+++ b/nebula_sniffer/requirements.txt
@@ -7,7 +7,7 @@ pika==0.12.0
 gevent==1.3.7
 six==1.12.0
 mmh3==2.5.1
-PyYAML==3.13
+PyYAML==5.4
 mock==2.0.0
 #pytest==4.0.2
 #pytest-cov==2.6.0
diff --git a/requirements.txt b/requirements.txt
index df5d9e1..4dbeb0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ numpy==1.16.4
 pandas==0.24.2
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 redis==3.2.1
 requests==2.22.0
 six==1.12.0