diff --git a/requirements-common.txt b/requirements-common.txt
index b79c700c8..2e52b84ad 100644
--- a/requirements-common.txt
+++ b/requirements-common.txt
@@ -29,4 +29,4 @@ python-rapidjson==0.7.2
 sdnotify==0.3.2
 
 # Api server
-flask==1.0.3
+flask==1.1.1