diff --git a/books/blackhat_python/requirements.txt b/books/blackhat_python/requirements.txt
old mode 100755
new mode 100644
index 3081020..81683a8
--- a/books/blackhat_python/requirements.txt
+++ b/books/blackhat_python/requirements.txt
@@ -4,7 +4,7 @@ chardet==3.0.4
 cryptography==2.9
 github3.py==1.3.0
 idna==2.9
-jwcrypto==0.7
+jwcrypto==1.4
 pycparser==2.20
 python-dateutil==2.8.1
 requests==2.23.0