diff --git a/requirements.txt b/requirements.txt
index 892611e..2a4aa76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-PyYAML==3.11
+PyYAML==5.4
 marisa-trie==0.7.2
 psutil==3.4.1
 urllib3==1.14