diff --git a/books/blackhat_python/requirements.txt b/books/blackhat_python/requirements.txt
old mode 100755
new mode 100644
index 3081020..51b4a2e
--- a/books/blackhat_python/requirements.txt
+++ b/books/blackhat_python/requirements.txt
@@ -1,4 +1,4 @@
-certifi==2019.11.28
+certifi==2022.12.7
 cffi==1.14.0
 chardet==3.0.4
 cryptography==2.9