diff --git a/examples/CH_09/requirements.txt b/examples/CH_09/requirements.txt
old mode 100755
new mode 100644
index 3c78ddd..8ba69ab
--- a/examples/CH_09/requirements.txt
+++ b/examples/CH_09/requirements.txt
@@ -32,7 +32,7 @@ PyJWT==2.4.0
 python-dateutil==2.8.2
 python-editor==1.0.4
 PyYAML==6.0
-requests==2.28.2
+requests==2.31.0
 sib-api-v3-sdk==7.5.0
 six==1.16.0
 SQLAlchemy==1.4.27