diff --git a/tools/visualisePropertyTree/requirements.txt b/tools/visualisePropertyTree/requirements.txt
index e515b15..d98a6a1 100644
--- a/tools/visualisePropertyTree/requirements.txt
+++ b/tools/visualisePropertyTree/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2017.4.17
+certifi==2022.12.7
 chardet==3.0.4
 idna==2.5
 isodate==0.5.4