diff --git a/libbeat/tests/system/requirements.txt b/libbeat/tests/system/requirements.txt
index 3f1d5730460..5a4a1bb09ee 100644
--- a/libbeat/tests/system/requirements.txt
+++ b/libbeat/tests/system/requirements.txt
@@ -36,7 +36,7 @@ pyrsistent==0.16.0
 pytest==7.3.2
 pytest-rerunfailures==9.1.1
 pytest-timeout==1.4.2
-PyYAML==5.4.1
+PyYAML==5.3.1
 redis==2.10.6
 requests==2.28.2
 semver==2.8.1