diff --git a/Chapter11/app/requirements.txt b/Chapter11/app/requirements.txt
index 5b5a84c..3387687 100644
--- a/Chapter11/app/requirements.txt
+++ b/Chapter11/app/requirements.txt
@@ -69,7 +69,7 @@ requests-file==1.4.3
 requests-toolbelt==0.9.1
 resampy==0.2.2
 rope==0.11.0
-rsa==4.0
+rsa==4.7
 ruamel-yaml==0.15.46
 s3transfer==0.2.0
 scikit-image==0.14.1