diff --git a/smartbugs/requirements.txt b/smartbugs/requirements.txt
old mode 100755
new mode 100644
index 0575c59..b567c43
--- a/smartbugs/requirements.txt
+++ b/smartbugs/requirements.txt
@@ -1,3 +1,3 @@
-PyYAML==5.1
+PyYAML==5.4
 docker==3.7.0
 solidity_parser==0.0.3