diff --git a/legacy/requirements.txt b/legacy/requirements.txt
index fd5b57e..bcf626c 100644
--- a/legacy/requirements.txt
+++ b/legacy/requirements.txt
@@ -53,7 +53,7 @@ pyasn1-modules==0.2.1
 pytz==2018.3
 PyYAML==3.12
 requests==2.18.4
-rsa==3.4.2
+rsa==4.7
 six==1.11.0
 stanfordcorenlp==3.8.0.1
 urllib3==1.22