diff --git a/probability/contrastive_divergence_vae/tensorflow1/requirements.txt b/probability/contrastive_divergence_vae/tensorflow1/requirements.txt
index 24106667d..d255c629d 100644
--- a/probability/contrastive_divergence_vae/tensorflow1/requirements.txt
+++ b/probability/contrastive_divergence_vae/tensorflow1/requirements.txt
@@ -1,5 +1,5 @@
 bleach==3.3.0
-certifi==2020.6.20
+certifi==2022.12.7
 chardet==3.0.4
 cycler==0.10.0
 html5lib==1.1