diff --git a/Zur/OZ_SDD_old/requirements.txt b/Zur/OZ_SDD_old/requirements.txt
index 9f33e5f2..46a89adf 100644
--- a/Zur/OZ_SDD_old/requirements.txt
+++ b/Zur/OZ_SDD_old/requirements.txt
@@ -51,7 +51,7 @@ pyparsing==2.4.7
 python-dateutil==2.8.1
 python-utils==2.4.0
 PyWavelets==1.1.1
-PyYAML==5.1
+PyYAML==5.4
 requests==2.24.0
 requests-oauthlib==1.3.0
 rsa==4.6