diff --git a/cygnus-ngsi/test/acceptance/requirements.txt b/cygnus-ngsi/test/acceptance/requirements.txt
index bce644e15..428fe4b6b 100644
--- a/cygnus-ngsi/test/acceptance/requirements.txt
+++ b/cygnus-ngsi/test/acceptance/requirements.txt
@@ -5,5 +5,5 @@ xmltodict==0.9.2
 mysql-python==1.2.5
 fabric==1.10.1
 termcolor==1.1.0
-pymongo==2.7.2
+pymongo==4.6.3  # blindly changed from 2.7.2 due to vulnerability check in github
 git+https://github.com/telefonicaid/lettuce-tools.git#egg=lettuce_tools