diff --git a/Nengo-Autoencoder/requirements.txt b/Nengo-Autoencoder/requirements.txt
index 461750b..1d293bc 100644
--- a/Nengo-Autoencoder/requirements.txt
+++ b/Nengo-Autoencoder/requirements.txt
@@ -3,7 +3,7 @@ astropy==4.0.1.post1
 astunparse==1.6.3
 Brian2==2.3.0.2
 cachetools==4.1.1
-certifi==2020.6.20
+certifi==2022.12.7
 cffi==1.14.0
 chardet==3.0.4
 cycler==0.10.0