diff --git a/AI-Tasks/ai-pacman-python37/requirements.txt b/AI-Tasks/ai-pacman-python37/requirements.txt
index 03b266c..14dde86 100644
--- a/AI-Tasks/ai-pacman-python37/requirements.txt
+++ b/AI-Tasks/ai-pacman-python37/requirements.txt
@@ -47,7 +47,7 @@ pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2018.3
 pywinpty==0.5.1
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==16.0.3
 qtconsole==4.3.1
 requests==2.14.2