diff --git a/tools/requirements.txt b/tools/requirements.txt
index c0f0bb6..092fd86 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -31,7 +31,7 @@ editdistance==0.3.1
 entrypoints==0.2.3
 enum34==1.1.6
 Flask==1.0.2
-flask-cors==3.0.6
+flask-cors==3.0.9
 funcsigs==1.0.2
 futures==3.1.1
 fuzzywuzzy==0.16.0