diff --git a/simulations/unity_poisson_sim/requirements.txt b/simulations/unity_poisson_sim/requirements.txt
index b4367e5..c29085a 100644
--- a/simulations/unity_poisson_sim/requirements.txt
+++ b/simulations/unity_poisson_sim/requirements.txt
@@ -16,7 +16,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 matplotlib==3.0.2
 mpmath==1.1.0
-numpy==1.15.4
+numpy==1.22.0
 pandas==0.24.2
 parso==0.3.1
 pexpect==4.6.0