diff --git a/07-MNIST-Keras-TensorFlow/BackEnd/requirements.txt b/07-MNIST-Keras-TensorFlow/BackEnd/requirements.txt
index 059583c..12bbc36 100644
--- a/07-MNIST-Keras-TensorFlow/BackEnd/requirements.txt
+++ b/07-MNIST-Keras-TensorFlow/BackEnd/requirements.txt
@@ -1,7 +1,7 @@
 absl-py==0.7.1
 astor==0.8.0
 cachetools==3.1.1
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 Click==7.0
 Flask==1.0.3