diff --git a/simulations/unity_poisson_sim/requirements.txt b/simulations/unity_poisson_sim/requirements.txt
index b4367e5..288aacc 100644
--- a/simulations/unity_poisson_sim/requirements.txt
+++ b/simulations/unity_poisson_sim/requirements.txt
@@ -1,7 +1,7 @@
 appnope==0.1.0
 backcall==0.1.0
 beautifulsoup4==4.7.1
-certifi==2019.3.9
+certifi==2022.12.7
 chardet==3.0.4
 cycler==0.10.0
 decorator==4.3.0