diff --git a/requirements.txt b/requirements.txt
index 0f1cefbcf..d128d3d67 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ nltk==3.4
 oauthlib==3.0.1
 Pillow==5.4.1
 python-dateutil==2.8.0
-PyYAML==5.1
+PyYAML==5.4
 requests==2.21.0
 requests-file==1.4.3
 requests-oauthlib==1.2.0