diff --git a/slack/slack_bot/requirements.txt b/slack/slack_bot/requirements.txt
old mode 100755
new mode 100644
index a208051..c85760a
--- a/slack/slack_bot/requirements.txt
+++ b/slack/slack_bot/requirements.txt
@@ -4,7 +4,7 @@ itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==0.23
 pyaml==16.9.0
-PyYAML==3.12
+PyYAML==5.4
 requests==2.20.0
 six==1.10.0
 slackclient==1.0.2