diff --git a/requirements.txt b/requirements.txt
index a7d643b..ae7ddcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ tweepy~=3.9.0
 python-dateutil~=2.8.2
 networkx~=2.5
 nltk~=3.5
-PyYAML~=5.3.1
+PyYAML~=5.4
 schedule~=0.6.0
 tqdm~=4.50.0
 numpy~=1.19.2