diff --git a/docker/requirements.txt b/docker/requirements.txt
index 2999f6b..f42abf7 100644
--- a/docker/requirements.txt
+++ b/docker/requirements.txt
@@ -1,7 +1,7 @@
 Flask==1.1.1
 Flask-Testing==0.7.1
 flake8==3.7.7
-flask_cors==3.0.7
+flask_cors==3.0.9
 requests==2.21.0
 jsonschema==3.0.1
 coverage==4.5.3